$BMRC
Bank of Marin Bancorp Stock $bmrc

$bmrc Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-K Financial Statement

#000140347513000017 Filed on March 14, 2013

Income Statement

Concept	2012 Q4	2011 Q4	2010
Revenue	$16.30M	$16.67M	$61.36M
YoY Change	-2.21%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$340.0K	$1.070M	$1.300M
YoY Change	-68.22%	245.16%	-5.11%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$507.0K	$948.0K	$6.448M
YoY Change	-46.52%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$7.325M	$5.008M	$21.72M
YoY Change	46.27%	-20.88%	5.97%
Income Tax	$2.623M	$1.625M	$8.171M
% Of Pretax Income	35.81%	32.45%	37.61%
Net Earnings	$4.702M	$3.383M	$13.55M
YoY Change	38.99%	-13.48%	5.88%
Net Earnings / Revenue	28.85%	20.3%	22.09%
Basic Earnings Per Share	$0.88	$0.64	$2.59
Diluted Earnings Per Share	$0.86	$0.63	$2.55
COMMON SHARES
Basic Shares Outstanding	5.357M shares	5.313M shares	5.238M shares
Diluted Shares Outstanding	5.451M shares	5.394M shares	5.314M shares

Balance Sheet

Concept	2012 Q4	2011 Q4	2010
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
Short-Term Investments	$293.4M	$194.8M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$9.344M	$9.498M	$8.400M
YoY Change	-1.62%	13.07%	5.0%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.435B	$1.393B	$1.208B
YoY Change	2.98%	15.32%	7.71%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$14.70M	$14.70M	$10.50M
YoY Change	0.0%	40.0%	22.09%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$14.70M	$14.70M	$10.50M
YoY Change	0.0%	40.0%	22.09%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$5.000M	$5.000M
YoY Change	-100.0%	0.0%	0.0%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$0.00	$5.000M	$5.000M
YoY Change	-100.0%	0.0%	0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$14.70M	$14.70M	$10.50M
Total Long-Term Liabilities	$0.00	$5.000M	$5.000M
Total Liabilities	$1.283B	$1.258B	$1.086B
YoY Change	2.01%	15.79%	7.27%
SHAREHOLDERS EQUITY
Retained Earnings	$91.16M	$77.10M
YoY Change	18.24%
Common Stock	$58.57M	$56.85M
YoY Change	3.02%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$151.8M	$135.6M	$121.9M
YoY Change
Total Liabilities & Shareholders Equity	$1.435B	$1.393B	$1.208B
YoY Change	2.98%	15.32%	7.71%

Cashflow Statement

Concept	2012 Q4	2011 Q4	2010
OPERATING ACTIVITIES
Net Income	$4.702M	$3.383M	$13.55M
YoY Change	38.99%	-13.48%	5.88%
Depreciation, Depletion And Amortization	$340.0K	$1.070M	$1.300M
YoY Change	-68.22%	245.16%	-5.11%
Cash From Operating Activities	$6.780M	$6.170M	$23.43M
YoY Change	9.89%	-8.59%	69.41%
INVESTING ACTIVITIES
Capital Expenditures	-$700.0K	-$330.0K	-$1.720M
YoY Change	112.12%	135.71%	53.57%
Acquisitions
YoY Change
Other Investing Activities	-$113.2M	-$34.52M	-$44.62M
YoY Change	227.98%	202.01%	-23.84%
Cash From Investing Activities	-$113.9M	-$34.85M	-$46.34M
YoY Change	226.89%	201.21%	-22.38%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-5.940M	25.64M	$69.49M
YoY Change	-123.17%	-433.42%	16.57%
NET CHANGE
Cash From Operating Activities	6.780M	6.170M	$23.43M
Cash From Investing Activities	-113.9M	-34.85M	-$46.34M
Cash From Financing Activities	-5.940M	25.64M	$69.49M
Net Change In Cash	-113.1M	-3.040M	$46.57M
YoY Change	3619.74%	-75.7%	239.2%
FREE CASH FLOW
Cash From Operating Activities	$6.780M	$6.170M	$23.43M
Capital Expenditures	-$700.0K	-$330.0K	-$1.720M
Free Cash Flow	$7.480M	$6.500M	$25.15M
YoY Change	15.08%	-5.66%	68.22%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2332000	USD
CY2010	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1194000	USD
CY2011	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1385000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11812000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10174000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1599000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2055000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	143000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	109000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	202000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	241000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	234000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	206000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	132000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	120000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	42000	USD
CY2011	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	6817000	USD
CY2012	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	2989000	USD
CY2010	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	9877000	USD
CY2010	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	119000	USD
CY2011	us-gaap	Advertising Expense AdvertisingExpense	589000	USD
CY2010	us-gaap	Advertising Expense AdvertisingExpense	459000	USD
CY2012	us-gaap	Advertising Expense AdvertisingExpense	541000	USD
CY2012	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	2900000	USD
CY2010	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	5350000	USD
CY2011	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	7050000	USD
CY2012	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	682000	USD
CY2010	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	210000	USD
CY2011	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	99000	USD
CY2012	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4560000	USD
CY2010	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3786000	USD
CY2011	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4902000	USD
CY2011	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	1200000	USD
CY2012	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	831000	USD
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	50000	shares
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	151000	shares
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	70000	shares
CY2011Q4	us-gaap	Assets Assets	1393263000	USD
CY2012Q4	us-gaap	Assets Assets	1434749000	USD
CY2011Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	132348000	USD
CY2012Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	150420000	USD
CY2011Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	135104000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	153962000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	150420000	USD
CY2011Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	132348000	USD
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	11930000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	22620000	USD
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	8173000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	22417000	USD
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	3757000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	203000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	23719000	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	11334000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	23820000	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	11507000	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	11439000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	26417000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	27060000	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	11616000	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	109575000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	100284000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	103082000	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	111981000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	150420000	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	132348000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	0	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	0	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2011Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	135104000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	153962000	USD
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	153962000	USD
CY2011Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	135104000	USD
CY2012Q1	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	34000	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	234000	USD
CY2011Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	339000	USD
CY2012Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	0	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	134000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	1000	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	339000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	234000	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	205000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	233000	USD
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	3776000	USD
CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	3095000	USD
CY2011	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	752000	USD
CY2010	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	690000	USD
CY2012	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	762000	USD
CY2012Q4	us-gaap	Cash Cash	1300000	USD
CY2012	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2010	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2011	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	44042000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	46572000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-101394000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	44511000	USD
CY2011Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	127732000	USD
CY2012Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	28349000	USD
CY2012Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	28349000	USD
CY2011Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	129743000	USD
CY2010Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	85232000	USD
CY2009Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	38660000	USD
CY2011Q1	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period Cash Flows Expected To Be Collected At Acquisition CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	11272000	USD
CY2011Q1	us-gaap	Certain Loans Acquired In Transfer Accretable Yield CertainLoansAcquiredInTransferAccretableYield	1902000	USD
CY2011Q1	us-gaap	Certain Loans Acquired In Transfer Nonaccretable Difference CertainLoansAcquiredInTransferNonaccretableDifference	13044000	USD
CY2010Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	0	USD
CY2011Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	5405000	USD
CY2012Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	3960000	USD
CY2012	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	1641000	USD
CY2011	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	1418000	USD
CY2011	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	1902000	USD
CY2012	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	0	USD
CY2012	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	1221000	USD
CY2011	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	1019000	USD
CY2012	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	1417000	USD
CY2011	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	5940000	USD
CY2011Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	9370000	USD
CY2011Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	24316000	USD
CY2011Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	5953000	USD
CY2011Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	9370000	USD
CY2012Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	4549000	USD
CY2012Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	8533000	USD
CY2011Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	20999000	USD
CY2011Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	12634000	USD
CY2012Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	5600000	USD
CY2012	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.70
CY2011	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.65
CY2010	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.61
CY2011Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2012Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	15000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	15000000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	5336927	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	5389210	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	5336927	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	5389210	shares
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	56854000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	58573000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	15617000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	18273000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	14480000	USD
CY2012Q4	us-gaap	Cost Method Investments Aggregate Carrying Amount CostMethodInvestmentsAggregateCarryingAmount	0	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6602000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7994000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7045000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8895000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	10869000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9680000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2635000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2293000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2875000	USD
CY2012Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	2700000	USD
CY2011Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	2700000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-503000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-205000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-4000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-489000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-724000	USD
CY2011Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2721000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	USD
CY2012Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3626000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-221000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	26000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-284000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	9726000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	10279000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	6653000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	7005000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	0	USD
CY2012Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	1000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	912000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	1195000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	1271000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	254000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	259000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	957000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	188000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	5955000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	6388000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	502000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	571000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	1158000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	1488000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	637000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	778000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	114000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	326000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	366000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	432000	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	277000	USD
CY2012	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.50
CY2012	us-gaap	Defined Contribution Plan Maximum Annual Contribution Per Employee Percent DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent	0.50
CY2012Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	276000	USD
CY2011Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	255000	USD
CY2011Q4	us-gaap	Deposits Deposits	1202972000	USD
CY2012Q4	us-gaap	Deposits Deposits	1253289000	USD
CY2011Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	434461000	USD
CY2012Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	443742000	USD
CY2012Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	169647000	USD
CY2011Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	134673000	USD
CY2012Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	93404000	USD
CY2011Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	75617000	USD
CY2012	us-gaap	Depreciation Depreciation	1400000	USD
CY2011	us-gaap	Depreciation Depreciation	1300000	USD
CY2010	us-gaap	Depreciation Depreciation	1300000	USD
CY2012	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1355000	USD
CY2011	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1293000	USD
CY2010	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1344000	USD
CY2011	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	3457000	USD
CY2010	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	3205000	USD
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	3751000	USD
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.94
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.59
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.34
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.55
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.28
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.89
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.379
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.376
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.371
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.002
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.001
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.001
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2010	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.061
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.065
CY2011	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.062
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	984000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	99000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	102000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	29000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	99000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	29000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	102000	USD
CY2012	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2010	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2011	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	107763000	USD
CY2012	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	917000	USD
CY2011	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1000000	USD
CY2010	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1506000	USD
CY2011Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary FederalHomeLoanBankAdvancesMaturitiesSummary	35000000	USD
CY2012Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary FederalHomeLoanBankAdvancesMaturitiesSummary	15000000	USD
CY2010	us-gaap	Fees And Commissions Debit Cards FeesAndCommissionsDebitCards	486000	USD
CY2012	us-gaap	Fees And Commissions Debit Cards FeesAndCommissionsDebitCards	1015000	USD
CY2011	us-gaap	Fees And Commissions Debit Cards FeesAndCommissionsDebitCards	845000	USD
CY2012	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	2130000	USD
CY2010	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1797000	USD
CY2011	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1836000	USD
CY2010	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	1521000	USD
CY2012	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	1964000	USD
CY2011	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	1834000	USD
CY2012Q4	us-gaap	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	4549000	USD
CY2011Q4	us-gaap	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	5953000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Acquired With Deteriorated Credit Quality FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality	263000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses Acquired With Deteriorated Credit Quality FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality	569000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	11307000	USD
CY2010Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	11314000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	11693000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	2091000	USD
CY2010Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1078000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	2377000	USD
CY2012Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1042907000	USD
CY2010Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	927291000	USD
CY2011Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1009523000	USD
CY2012Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	26496000	USD
CY2010Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	14109000	USD
CY2011Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	15678000	USD
CY2012Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	18284000	USD
CY2011Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	10655000	USD
CY2011Q4	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts FinancingReceivableModificationsSubsequentDefaultNumberOfContracts	3	loans
CY2012Q4	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment FinancingReceivableModificationsSubsequentDefaultRecordedInvestment	4500000	USD
CY2011Q4	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment FinancingReceivableModificationsSubsequentDefaultRecordedInvestment	1000000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	588000	USD
CY2011Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	7209000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	0	USD
CY2011Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	173000	USD
CY2011Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1011802000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1055712000	USD
CY2011Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	11970000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	17652000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	18240000	USD
CY2011Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	19352000	USD
CY2010	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-3000	USD
CY2011	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-117000	USD
CY2012	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-20000	USD
CY2010	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-15000	USD
CY2011	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	10000	USD
CY2012	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-14000	USD
CY2011Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	59738000	USD
CY2012Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	139452000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	59738000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	139452000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	26000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	0	USD
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLosses	241000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLosses	534000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	24341000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	48845000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	215000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	534000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	22566000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	48845000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	1775000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	22940000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	98672000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	24240000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	30898000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	22145000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	29165000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	99689000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	23133000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	10881000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	11445000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	10851000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	11310000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities Fair Value HeldToMaturitySecuritiesDebtMaturitiesFairValue	62185000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Fair Value HeldToMaturitySecuritiesDebtMaturitiesFairValue	142231000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount	139452000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount	59738000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	3367000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	763000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	3343000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	764000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Fair Value Disclosure HeldToMaturitySecuritiesFairValueDisclosure	62185000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Fair Value Disclosure HeldToMaturitySecuritiesFairValueDisclosure	142231000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Pledged As Collateral HeldToMaturitySecuritiesPledgedAsCollateral	47000000	USD
CY2011Q4	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	241000	USD
CY2012Q4	us-gaap	Held To Maturity Securities Unrecognized Holding Loss HeldToMaturitySecuritiesUnrecognizedHoldingLoss	534000	USD
CY2012Q4	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	3313000	USD
CY2011Q4	us-gaap	Heldtomaturity Securities Unrecognized Holding Gain HeldtomaturitySecuritiesUnrecognizedHoldingGain	2688000	USD
CY2012	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	37328000	USD
CY2011	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	14937000	USD
CY2010	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12180000	USD
CY2011	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	252000	USD
CY2010	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	522000	USD
CY2012	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	2299000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	30303000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	20145000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2946000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2354000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	31045000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	39370000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	11181000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	18788000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	19130000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	23959000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	8964000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	11515000	USD
CY2011Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	11915000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	15411000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	28708000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24755000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21723000	USD
CY2012Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	80000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10891000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9191000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	11421000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	9159000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	7610000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8171000	USD
CY2011	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	431000	USD
CY2012	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	435000	USD
CY2010	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-131000	USD
CY2012	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	50317000	USD
CY2011	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	93152000	USD
CY2010	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	71678000	USD
CY2012	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-156000	USD
CY2010	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	97000	USD
CY2011	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-33000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1051000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-713000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-555000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1268000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1138000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-526000	USD
CY2012	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	45000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	26000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	37000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	4000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	4000	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	5000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	41000	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	47000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	46000	shares
CY2011	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2690000	USD
CY2012	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2514000	USD
CY2010	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1916000	USD
CY2010	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	61357000	USD
CY2012	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	65766000	USD
CY2011	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	69114000	USD
CY2012	us-gaap	Interest And Dividend Income Securities Other InterestAndDividendIncomeSecuritiesOther	1165000	USD
CY2010	us-gaap	Interest And Dividend Income Securities Other InterestAndDividendIncomeSecuritiesOther	593000	USD
CY2011	us-gaap	Interest And Dividend Income Securities Other InterestAndDividendIncomeSecuritiesOther	636000	USD
CY2011	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	63479000	USD
CY2012	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	59403000	USD
CY2010	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	56239000	USD
CY2011	us-gaap	Interest Expense InterestExpense	5295000	USD
CY2010	us-gaap	Interest Expense InterestExpense	6448000	USD
CY2011	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	2209000	USD
CY2012	us-gaap	Interest Expense InterestExpense	2576000	USD
CY2010	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	1430000	USD
CY2012	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	497000	USD
CY2012	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	689000	USD
CY2010	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	2467000	USD
CY2011	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	1286000	USD
CY2011	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	151000	USD
CY2010	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	110000	USD
CY2012	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	151000	USD
CY2012	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	88000	USD
CY2011	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	98000	USD
CY2010	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	104000	USD
CY2012	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	1200000	USD
CY2010	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	2300000	USD
CY2011	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	1600000	USD
CY2011	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	56769000	USD
CY2010	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	49559000	USD
CY2012	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	60290000	USD
CY2010	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	54909000	USD
CY2011	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	63819000	USD
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	63190000	USD
CY2010	us-gaap	Interest Income Securities Other Us Government InterestIncomeSecuritiesOtherUSGovernment	3234000	USD
CY2012	us-gaap	Interest Income Securities Other Us Government InterestIncomeSecuritiesOtherUSGovernment	3195000	USD
CY2011	us-gaap	Interest Income Securities Other Us Government InterestIncomeSecuritiesOtherUSGovernment	3478000	USD
CY2012	us-gaap	Interest Income Securities State And Municipal InterestIncomeSecuritiesStateAndMunicipal	1789000	USD
CY2011	us-gaap	Interest Income Securities State And Municipal InterestIncomeSecuritiesStateAndMunicipal	1299000	USD
CY2010	us-gaap	Interest Income Securities State And Municipal InterestIncomeSecuritiesStateAndMunicipal	1146000	USD
CY2011	us-gaap	Interest Paid InterestPaid	5328000	USD
CY2012	us-gaap	Interest Paid InterestPaid	2732000	USD
CY2010	us-gaap	Interest Paid InterestPaid	7246000	USD
CY2012	us-gaap	Labor And Related Expense LaborAndRelatedExpense	21139000	USD
CY2011	us-gaap	Labor And Related Expense LaborAndRelatedExpense	20211000	USD
CY2010	us-gaap	Labor And Related Expense LaborAndRelatedExpense	18240000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3100000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2900000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3300000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	1257712000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	1282957000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1393263000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1434749000	USD
CY2010	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2012	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2011	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	107678000	USD
CY2011Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	21600000	USD
CY2012Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	22700000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	14639000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13661000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	12392000	USD
CY2009Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	10618000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1600000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	769000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	957000	USD
CY2011	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	821000	USD
CY2010	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	756000	USD
CY2012	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	937000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1073952000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	941400000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1031154000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1016515000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1060291000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	0.012
CY2012Q4	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	0.016
CY2012Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	3425000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	6866000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	6997000	USD
CY2009Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	7401000	USD
CY2011	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	1690000	USD
CY2010	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	95000	USD
CY2012	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	826000	USD
CY2010	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	499000	USD
CY2011	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	1864000	USD
CY2012	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	2730000	USD
CY2012	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	34000	USD
CY2010	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	0	USD
CY2011	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	0	USD
CY2011Q4	us-gaap	Marketable Securities MarketableSecurities	194842000	USD
CY2012Q4	us-gaap	Marketable Securities MarketableSecurities	293414000	USD
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Nature of Operations</font><font style="font-family:Arial;font-size:10pt;">: Bancorp, headquartered in Novato, CA, conducts business primarily through its wholly-owned subsidiary, the Bank, which provides a wide range of financial services to customers, who are predominantly professionals, small and middle-market businesses, and individuals who work and/or reside in Marin, Napa, San Francisco and Sonoma counties. Besides the headquarter office in Novato, CA, the Bank operates ten branches in Marin County, one in Napa County, one in San Francisco and five in Sonoma County. Our accounting and reporting policies conform to generally accepted accounting principles, general practice, and regulatory guidance within the banking industry. A summary of our significant policies follows.</font></div></div>
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	22665000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	69487000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	57068000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-34938000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-46344000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-144865000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	23429000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	22381000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	20806000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	17817000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	13552000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	15564000	USD
CY2011Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	359591000	USD
CY2012Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	389722000	USD
CY2010	us-gaap	Noninterest Expense NoninterestExpense	33357000	USD
CY2012	us-gaap	Noninterest Expense NoninterestExpense	38694000	USD
CY2011	us-gaap	Noninterest Expense NoninterestExpense	38283000	USD
CY2010	us-gaap	Noninterest Income NoninterestIncome	5521000	USD
CY2012	us-gaap	Noninterest Income NoninterestIncome	7112000	USD
CY2011	us-gaap	Noninterest Income NoninterestIncome	6269000	USD
CY2010	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	449000	USD
CY2012	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	502000	USD
CY2011	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	649000	USD
CY2012	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	26657000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	2911000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2986000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2964000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2881000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	2806000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	12109000	USD
CY2011Q4	us-gaap	Other Assets OtherAssets	42665000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	43351000	USD
CY2012	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	786000	USD
CY2010	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	672000	USD
CY2012	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	330000	USD
CY2010	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	1600000	USD
CY2011	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	90000	USD
CY2011	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	37000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	928000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	53000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	456000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	34000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	752000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1600000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	90000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	14668000	USD
CY2011Q4	us-gaap	Other Liabilities OtherLiabilities	14740000	USD
CY2011	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6588000	USD
CY2010	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4858000	USD
CY2012	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6199000	USD
CY2010	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	0	USD
CY2012	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	0	USD
CY2011	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-219000	USD
CY2012	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	43169000	USD
CY2010	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	26804000	USD
CY2011	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	25182000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3205000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3751000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3457000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	50517000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	92686000	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	73405000	USD
CY2011	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	26804000	USD
CY2010	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	5464000	USD
CY2012	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	87290000	USD
CY2012	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	364000	USD
CY2010	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	0	USD
CY2011	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	2500000	USD
CY2011	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2472000	USD
CY2010	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1723000	USD
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1221000	USD
CY2011Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Loans Receivable Pledged For Federal Home Loan Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivablePledgedForFederalHomeLoanBankDebt	547600000	USD
CY2012Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Loans Receivable Pledged For Federal Home Loan Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivablePledgedForFederalHomeLoanBankDebt	567800000	USD
CY2011Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2012Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	68251000	USD
CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	37158000	USD
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	51899000	USD
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	6458000	USD
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1755000	USD
CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	790000	USD
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2186000	USD
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
CY2011	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	421000	USD
CY2012	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	41000	USD
CY2010	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	216000	USD
CY2010	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2011	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	18000	USD
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2010	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	895000	USD
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	741000	USD
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1041000	USD
CY2012	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	29000	USD
CY2010	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	17000	USD
CY2011	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	33000	USD
CY2011	us-gaap	Professional Fees ProfessionalFees	2499000	USD
CY2010	us-gaap	Professional Fees ProfessionalFees	1917000	USD
CY2012	us-gaap	Professional Fees ProfessionalFees	2340000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	19518000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	21310000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	9344000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	9498000	USD
CY2010	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	5350000	USD
CY2012	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2900000	USD
CY2011	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	7050000	USD
CY2012Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	7300000	USD
CY2011	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	33500000	USD
CY2010	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	0	USD
CY2012	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	20000000	USD
CY2011	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2012	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	5000000	USD
CY2010	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	91164000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	77098000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	408000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	377000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	350000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	380	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	30.05
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	9030	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	38.18
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	18165	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	21610	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	34.05
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	30.52
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	5205	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	29.17
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0185
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0178
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0169
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.2820
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.2870
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.2892
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0277
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0160
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0294
CY2007Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	500000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	135850	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	534000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	400000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	782000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	640	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	21652	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	670	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	31.51
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	29.28
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	31.41
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	23930	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	29601	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	17585	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.82
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.01
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	11.19
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	2068000	USD
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	2016000	USD
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1828000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1661000	USD
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	299806	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	317804	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	285533	shares
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	359795	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	31.73
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	29.27
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	27.54
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.71
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	217232	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	226989	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	225246	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	29.12
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	31.15
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	30.64
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	1579000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	1372000	USD
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	1330000	USD
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	27.70
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	17.92
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	21.22
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	37.76
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	38.18
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	32.74
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y6M
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y8M12D
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y2M5D
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y8M12D
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y5M5D
CY2009	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y5M5D
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P3Y4M21D
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P3Y9M26D
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P4Y3M18D
CY2010	us-gaap	Stock Issued1 StockIssued1	200000	USD
CY2012	us-gaap	Stock Issued1 StockIssued1	199000	USD
CY2011	us-gaap	Stock Issued1 StockIssued1	200000	USD
CY2010	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	49940	shares
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	37563	shares
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	34913	shares
CY2011	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	33000	USD
CY2012	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	25000	USD
CY2010	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	17000	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2011	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2011	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1041000	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	741000	USD
CY2010	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	895000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	151792000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	135551000	USD
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	109051000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	121920000	USD
CY2012Q4	us-gaap	Subordinated Debt SubordinatedDebt	0	USD
CY2011Q4	us-gaap	Subordinated Debt SubordinatedDebt	5000000	USD
CY2012Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	102000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	14454000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	20659000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	101988000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	8304000	USD
CY2012Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	11267000	USD
CY2012Q4	us-gaap	Time Deposits TimeDeposits	156774000	USD
CY2011Q4	us-gaap	Time Deposits TimeDeposits	198600000	USD
CY2011Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	151600000	USD
CY2012Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	114700000	USD
CY2011	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	301000	USD
CY2012	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	65000	USD
CY2010	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	270000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	1000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLosses	580000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-style:italic;">Use of Estimates:</font><font style="font-family:Arial;font-size:10pt;"> The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant accounting estimates reflected in the consolidated financial statements include ALLL, other-than-temporary impairment of investment securities, estimated cash flows on PCI loans, accounting for income taxes and fair value measurements as discussed in the Notes herein.</font></div></div>
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5384000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5438000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5314000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5341000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5302000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5238000	shares
CY2012Q4	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	42000	USD
CY2012	bmrc	Accretion Of Discount On Acquired Loans AccretionOfDiscountOnAcquiredLoans	2430000	USD
CY2010	bmrc	Accretion Of Discount On Acquired Loans AccretionOfDiscountOnAcquiredLoans	0	USD
CY2011	bmrc	Accretion Of Discount On Acquired Loans AccretionOfDiscountOnAcquiredLoans	4275000	USD
CY2011Q4	bmrc	Accruing Tdr Loans AccruingTdrLoans	6300000	USD
CY2012Q4	bmrc	Accruing Tdr Loans AccruingTdrLoans	10800000	USD
CY2011	bmrc	Amortization And Impairment Write Off Of Core Deposit Intangible AmortizationAndImpairmentWriteOffOfCoreDepositIntangible	725000	USD
CY2010	bmrc	Amortization And Impairment Write Off Of Core Deposit Intangible AmortizationAndImpairmentWriteOffOfCoreDepositIntangible	0	USD
CY2012	bmrc	Amortization And Impairment Write Off Of Core Deposit Intangible AmortizationAndImpairmentWriteOffOfCoreDepositIntangible	0	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Amortized Cost Basis AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesAmortizedCostBasis	289872000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Amortized Cost Basis AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesAmortizedCostBasis	192086000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	160000	USD
CY2011	bmrc	Compensation Expense Common Stock For Director Fees CompensationExpenseCommonStockForDirectorFees	200000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLosses	768000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Fair Value Total AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueTotal	71465000	USD
CY2008Q4	bmrc	Class Of Warrant Or Right Exercisable Period Of Warrants Or Rights ClassOfWarrantOrRightExercisablePeriodOfWarrantsOrRights	P10Y
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Fair Value Total AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueTotal	36271000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	420000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	767000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	30739000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	71262000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	5532000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	203000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Fair Value AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesFairValue	197289000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Fair Value AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesFairValue	296193000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Unrealized Gain AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesUnrealizedGain	5783000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Unrealized Gain AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesUnrealizedGain	7089000	USD
CY2012Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Unrealized Loss AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesUnrealizedLoss	768000	USD
CY2011Q4	bmrc	Available For Sale Securities And Held To Maturity Securities Unrealized Loss AvailableForSaleSecuritiesAndHeldToMaturitySecuritiesUnrealizedLoss	580000	USD
CY2010Q4	bmrc	Business Combinations Number Of Days Or More Past Due Loans Excluded From Purchase BusinessCombinationsNumberOfDaysOrMorePastDueLoansExcludedFromPurchase	P60D
CY2012Q4	bmrc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance Accrual Status CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalanceAccrualStatus	3000000	USD
CY2011Q4	bmrc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance Accrual Status CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalanceAccrualStatus	3400000	USD
CY2011Q4	bmrc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance Nonaccrual Status CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalanceNonaccrualStatus	2500000	USD
CY2012Q4	bmrc	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance Nonaccrual Status CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalanceNonaccrualStatus	1600000	USD
CY2011Q4	bmrc	Certain Loans Acquired In Transfer Without Evidence Of Deterioriated Credit Unaccreted Purchase Discounts CertainLoansAcquiredInTransferWithoutEvidenceOfDeterioriatedCreditUnaccretedPurchaseDiscounts	2900000	USD
CY2012Q4	bmrc	Certain Loans Acquired In Transfer Without Evidence Of Deterioriated Credit Unaccreted Purchase Discounts CertainLoansAcquiredInTransferWithoutEvidenceOfDeterioriatedCreditUnaccretedPurchaseDiscounts	2100000	USD
CY2012Q4	bmrc	Certain Loans And Debt Securities Acquired In Transfer Net Of Related Allowance For Credit Losses Due To Subsequent Impairment CertainLoansAndDebtSecuritiesAcquiredInTransferNetOfRelatedAllowanceForCreditLossesDueToSubsequentImpairment	3800000	USD
CY2011Q4	bmrc	Certain Loans And Debt Securities Acquired In Transfer Net Of Related Allowance For Credit Losses Due To Subsequent Impairment CertainLoansAndDebtSecuritiesAcquiredInTransferNetOfRelatedAllowanceForCreditLossesDueToSubsequentImpairment	4500000	USD
CY2011Q4	bmrc	Certificate Of Deposit Account Registry Service Time Accounts CertificateOfDepositAccountRegistryServiceTimeAccounts	46630000	USD
CY2012Q4	bmrc	Certificate Of Deposit Account Registry Service Time Accounts CertificateOfDepositAccountRegistryServiceTimeAccounts	15718000	USD
CY2010	bmrc	Compensation Expense Common Stock For Director Fees CompensationExpenseCommonStockForDirectorFees	200000	USD
CY2012	bmrc	Compensation Expense Common Stock For Director Fees CompensationExpenseCommonStockForDirectorFees	209000	USD
CY2012Q4	bmrc	Financing Receivable Impaired Loans Portion Of Loans Charged Off FinancingReceivableImpairedLoansPortionOfLoansChargedOff	5800000	USD
CY2012	bmrc	Financing Receivable Modifications Contracts Modified During Period Recorded Investment FinancingReceivableModificationsContractsModifiedDuringPeriodRecordedInvestment	9814000	USD
CY2012	bmrc	Deferred Compensation Arrangement With Individual Deferred Interest Earned Prime Rate DeferredCompensationArrangementWithIndividualDeferredInterestEarnedPrimeRate	0.0325
CY2010	bmrc	Deferred Compensation Arrangement With Individual Deferred Interest Earned Prime Rate DeferredCompensationArrangementWithIndividualDeferredInterestEarnedPrimeRate	0.0325
CY2011	bmrc	Deferred Compensation Arrangement With Individual Deferred Interest Earned Prime Rate DeferredCompensationArrangementWithIndividualDeferredInterestEarnedPrimeRate	0.0325
CY2011Q4	bmrc	Deferred Tax Asset Core Deposit Intangible Asset DeferredTaxAssetCoreDepositIntangibleAsset	287000	USD
CY2012Q4	bmrc	Deferred Tax Asset Core Deposit Intangible Asset DeferredTaxAssetCoreDepositIntangibleAsset	266000	USD
CY2012Q4	bmrc	Deferred Tax Liabilities Deferred Loan Origination Costs DeferredTaxLiabilitiesDeferredLoanOriginationCosts	1052000	USD
CY2011Q4	bmrc	Deferred Tax Liabilities Deferred Loan Origination Costs DeferredTaxLiabilitiesDeferredLoanOriginationCosts	760000	USD
CY2011Q4	bmrc	Deferred Tax Liabilities Loans And Investment Securities DeferredTaxLiabilitiesLoansAndInvestmentSecurities	25000	USD
CY2012Q4	bmrc	Deferred Tax Liabilities Loans And Investment Securities DeferredTaxLiabilitiesLoansAndInvestmentSecurities	449000	USD
CY2012	bmrc	Defined Benefit Plan Percentage Of Salary Paid Upon Retirement DefinedBenefitPlanPercentageOfSalaryPaidUponRetirement	0.25
CY2012	bmrc	Defined Benefits Plan Period Before Ratable Vesting Begins DefinedBenefitsPlanPeriodBeforeRatableVestingBegins	P5Y
CY2012	bmrc	Defined Contribution Plan Employer Matching Contribution Maximum Amount DefinedContributionPlanEmployerMatchingContributionMaximumAmount	4000	USD
CY2012	bmrc	Defined Contribution Plan Minimum Age Of Eligible Employee DefinedContributionPlanMinimumAgeOfEligibleEmployee	18	Y
CY2012	bmrc	Defined Contribution Plan Minimum Annual Contribution Per Employee Percent DefinedContributionPlanMinimumAnnualContributionPerEmployeePercent	0.01
CY2012	bmrc	Defined Contribution Plan Minimum Employment Period To Qualify For Plan DefinedContributionPlanMinimumEmploymentPeriodToQualifyForPlan	P90D
CY2012	bmrc	Defined Contribution Plan Number Of Enrollment Dates DefinedContributionPlanNumberOfEnrollmentDates	4	date
CY2012Q4	bmrc	Dividends Cash Dividend Amount Retained Earnings Available For Dividend Payments Under Restriction DividendsCashDividendAmountRetainedEarningsAvailableForDividendPaymentsUnderRestriction	42600000	USD
CY2012	bmrc	Dividends Cash Dividend Period Restricted Payment Amount Is Determined DividendsCashDividendPeriodRestrictedPaymentAmountIsDetermined	P3Y
CY2011	bmrc	Effective Income Tax Rate Reconciliation Tax Exempt Income Earnings On Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationTaxExemptIncomeEarningsOnBankOwnedLifeInsurance	-0.011
CY2012	bmrc	Effective Income Tax Rate Reconciliation Tax Exempt Income Earnings On Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationTaxExemptIncomeEarningsOnBankOwnedLifeInsurance	-0.009
CY2010	bmrc	Effective Income Tax Rate Reconciliation Tax Exempt Income Earnings On Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationTaxExemptIncomeEarningsOnBankOwnedLifeInsurance	-0.011
CY2011	bmrc	Effective Income Tax Rate Reconciliation Tax Exempt Income Interest On Municipal Securities And Loans EffectiveIncomeTaxRateReconciliationTaxExemptIncomeInterestOnMunicipalSecuritiesAndLoans	-0.028
CY2012	bmrc	Effective Income Tax Rate Reconciliation Tax Exempt Income Interest On Municipal Securities And Loans EffectiveIncomeTaxRateReconciliationTaxExemptIncomeInterestOnMunicipalSecuritiesAndLoans	-0.029
CY2010	bmrc	Effective Income Tax Rate Reconciliation Tax Exempt Income Interest On Municipal Securities And Loans EffectiveIncomeTaxRateReconciliationTaxExemptIncomeInterestOnMunicipalSecuritiesAndLoans	-0.027
CY2011Q3	bmrc	Federal Home Loan Bank Advances Prepayment FederalHomeLoanBankAdvancesPrepayment	20000000	USD
CY2011Q3	bmrc	Federal Home Loan Bank Advances Prepayment Penalty FederalHomeLoanBankAdvancesPrepaymentPenalty	924000	USD
CY2012Q4	bmrc	Federal Home Loan Bank Stock Par Value FederalHomeLoanBankStockParValue	100
CY2011	bmrc	Financing Receivable Modifications Contracts Modified During Period Recorded Investment FinancingReceivableModificationsContractsModifiedDuringPeriodRecordedInvestment	10655000	USD
CY2012	bmrc	Financing Receivable Modifications Contracts Modified In Period Post Modification Recorded Investment FinancingReceivableModificationsContractsModifiedInPeriodPostModificationRecordedInvestment	14801000	USD
CY2011	bmrc	Financing Receivable Modifications Contracts Modified In Period Post Modification Recorded Investment FinancingReceivableModificationsContractsModifiedInPeriodPostModificationRecordedInvestment	11701000	USD
CY2011	bmrc	Financing Receivable Modifications Contracts Modified In Period Pre Modification Recorded Investment FinancingReceivableModificationsContractsModifiedInPeriodPreModificationRecordedInvestment	11589000	USD
CY2012	bmrc	Financing Receivable Modifications Contracts Modified In Period Pre Modification Recorded Investment FinancingReceivableModificationsContractsModifiedInPeriodPreModificationRecordedInvestment	14898000	USD
CY2011	bmrc	Financing Receivable Modifications Number Of Contracts Modified In Period FinancingReceivableModificationsNumberOfContractsModifiedInPeriod	50
CY2012	bmrc	Financing Receivable Modifications Number Of Contracts Modified In Period FinancingReceivableModificationsNumberOfContractsModifiedInPeriod	22
CY2012Q4	bmrc	Financing Receivable Modifications Subsequent Default Recorded Investment Charged Off Net Of Recoveries FinancingReceivableModificationsSubsequentDefaultRecordedInvestmentChargedOffNetOfRecoveries	730000	USD
CY2011Q4	bmrc	Financing Receivable Modifications Subsequent Default Recorded Investment Charged Off Net Of Recoveries FinancingReceivableModificationsSubsequentDefaultRecordedInvestmentChargedOffNetOfRecoveries	1000000	USD
CY2011	bmrc	Gain Loss From Bargain Purchase Acquisition Net Of Tax GainLossFromBargainPurchaseAcquisitionNetOfTax	85000	USD
CY2012	bmrc	Gain Loss From Bargain Purchase Acquisition Net Of Tax GainLossFromBargainPurchaseAcquisitionNetOfTax	0	USD
CY2010	bmrc	Gain Loss From Bargain Purchase Acquisition Net Of Tax GainLossFromBargainPurchaseAcquisitionNetOfTax	0	USD
CY2012	bmrc	Income Loss From Fiduciary And Trust Activities Net Of Tax IncomeLossFromFiduciaryAndTrustActivitiesNetOfTax	327000	USD
CY2010	bmrc	Income Loss From Fiduciary And Trust Activities Net Of Tax IncomeLossFromFiduciaryAndTrustActivitiesNetOfTax	146000	USD
CY2011	bmrc	Income Loss From Fiduciary And Trust Activities Net Of Tax IncomeLossFromFiduciaryAndTrustActivitiesNetOfTax	312000	USD
CY2012	bmrc	Income Tax Expense Benefit Fiduciary And Trust Activities IncomeTaxExpenseBenefitFiduciaryAndTrustActivities	200000	USD
CY2011	bmrc	Income Tax Expense Benefit Fiduciary And Trust Activities IncomeTaxExpenseBenefitFiduciaryAndTrustActivities	184000	USD
CY2010	bmrc	Income Tax Expense Benefit Fiduciary And Trust Activities IncomeTaxExpenseBenefitFiduciaryAndTrustActivities	88000	USD
CY2012	bmrc	Increase Decrease In Deferred Rent And Other Rent Related Expenses IncreaseDecreaseInDeferredRentAndOtherRentRelatedExpenses	331000	USD
CY2010	bmrc	Increase Decrease In Deferred Rent And Other Rent Related Expenses IncreaseDecreaseInDeferredRentAndOtherRentRelatedExpenses	253000	USD
CY2011	bmrc	Increase Decrease In Deferred Rent And Other Rent Related Expenses IncreaseDecreaseInDeferredRentAndOtherRentRelatedExpenses	236000	USD
CY2011	bmrc	Increase Decrease In Unrealized Gain Loss On Available For Sale Securities Net Of Tax IncreaseDecreaseInUnrealizedGainLossOnAvailableForSaleSecuritiesNetOfTax	90000	USD
CY2010	bmrc	Increase Decrease In Unrealized Gain Loss On Available For Sale Securities Net Of Tax IncreaseDecreaseInUnrealizedGainLossOnAvailableForSaleSecuritiesNetOfTax	1600000	USD
CY2012	bmrc	Increase Decrease In Unrealized Gain Loss On Available For Sale Securities Net Of Tax IncreaseDecreaseInUnrealizedGainLossOnAvailableForSaleSecuritiesNetOfTax	786000	USD
CY2012	bmrc	Interest On Certificate Of Deposit Account Registry Service Time Accounts InterestOnCertificateOfDepositAccountRegistryServiceTimeAccounts	83000	USD
CY2010	bmrc	Interest On Certificate Of Deposit Account Registry Service Time Accounts InterestOnCertificateOfDepositAccountRegistryServiceTimeAccounts	842000	USD
CY2011	bmrc	Interest On Certificate Of Deposit Account Registry Service Time Accounts InterestOnCertificateOfDepositAccountRegistryServiceTimeAccounts	237000	USD
CY2012	bmrc	Interest On Other Time Accounts InterestOnOtherTimeAccounts	1068000	USD
CY2010	bmrc	Interest On Other Time Accounts InterestOnOtherTimeAccounts	1495000	USD
CY2011	bmrc	Interest On Other Time Accounts InterestOnOtherTimeAccounts	1314000	USD
CY2011	bmrc	Interest On Short Term Investments And Federal Funds Sold InterestOnShortTermInvestmentsAndFederalFundsSold	222000	USD
CY2010	bmrc	Interest On Short Term Investments And Federal Funds Sold InterestOnShortTermInvestmentsAndFederalFundsSold	145000	USD
CY2012	bmrc	Interest On Short Term Investments And Federal Funds Sold InterestOnShortTermInvestmentsAndFederalFundsSold	214000	USD
CY2012Q4	bmrc	Life Insurance Corporate Or Bank Owned Death Benefits LifeInsuranceCorporateOrBankOwnedDeathBenefits	50900000	USD
CY2012	bmrc	Life Insurance Corporate Or Bank Owned Mortality Costs LifeInsuranceCorporateOrBankOwnedMortalityCosts	153000	USD
CY2011	bmrc	Life Insurance Corporate Or Bank Owned Mortality Costs LifeInsuranceCorporateOrBankOwnedMortalityCosts	132000	USD
CY2010	bmrc	Life Insurance Corporate Or Bank Owned Mortality Costs LifeInsuranceCorporateOrBankOwnedMortalityCosts	113000	USD
CY2012Q4	bmrc	Life Insurance Corporate Or Bank Owned Number Of Policies LifeInsuranceCorporateOrBankOwnedNumberOfPolicies	92	policy
CY2012Q4	bmrc	Loans And Leases Receivable Ratio Of Allowance For Loan Losses To Non Accrual Loans LoansAndLeasesReceivableRatioOfAllowanceForLoanLossesToNonAccrualLoans	0.77
CY2010Q4	bmrc	Loans And Leases Receivable Ratio Of Allowance For Loan Losses To Non Accrual Loans LoansAndLeasesReceivableRatioOfAllowanceForLoanLossesToNonAccrualLoans	0.96
CY2011Q4	bmrc	Loans And Leases Receivable Ratio Of Allowance For Loan Losses To Non Accrual Loans LoansAndLeasesReceivableRatioOfAllowanceForLoanLossesToNonAccrualLoans	1.22
CY2012Q4	bmrc	Loans And Leases Receivable Ratio Of Allowance For Loan Losses To Total Loans LoansAndLeasesReceivableRatioOfAllowanceForLoanLossesToTotalLoans	0.0127
CY2010Q4	bmrc	Loans And Leases Receivable Ratio Of Allowance For Loan Losses To Total Loans LoansAndLeasesReceivableRatioOfAllowanceForLoanLossesToTotalLoans	0.0132
CY2011Q4	bmrc	Loans And Leases Receivable Ratio Of Allowance For Loan Losses To Total Loans LoansAndLeasesReceivableRatioOfAllowanceForLoanLossesToTotalLoans	0.0142
CY2011	bmrc	Loans And Leases Receivable Reclassified As Unrelated Party Loan LoansAndLeasesReceivableReclassifiedAsUnrelatedPartyLoan	0	USD
CY2010	bmrc	Loans And Leases Receivable Reclassified As Unrelated Party Loan LoansAndLeasesReceivableReclassifiedAsUnrelatedPartyLoan	0	USD
CY2012	bmrc	Loans And Leases Receivable Reclassified As Unrelated Party Loan LoansAndLeasesReceivableReclassifiedAsUnrelatedPartyLoan	1540000	USD
CY2012	bmrc	Loans And Leases Receivable Related Parties Advances LoansAndLeasesReceivableRelatedPartiesAdvances	3000	USD
CY2011	bmrc	Loans And Leases Receivable Related Parties Advances LoansAndLeasesReceivableRelatedPartiesAdvances	43000	USD
CY2010	bmrc	Loans And Leases Receivable Related Parties Advances LoansAndLeasesReceivableRelatedPartiesAdvances	0	USD
CY2012	bmrc	Loss Contingency Settlement Agreement Credit Card Interchange Rate Basis Point Reduction LossContingencySettlementAgreementCreditCardInterchangeRateBasisPointReduction	0.001
CY2012	bmrc	Loss Contingency Settlement Agreement Credit Card Interchange Rate Period Of Reduction LossContingencySettlementAgreementCreditCardInterchangeRatePeriodOfReduction	P8M
CY2011Q4	bmrc	Marketable Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions MarketableSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	17	security
CY2012Q4	bmrc	Marketable Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions MarketableSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	55	security
CY2011	bmrc	Merchant Interchange Fees MerchantInterchangeFees	353000	USD
CY2010	bmrc	Merchant Interchange Fees MerchantInterchangeFees	578000	USD
CY2012	bmrc	Merchant Interchange Fees MerchantInterchangeFees	739000	USD
CY2012	bmrc	Noninterest Expense Fiduciary And Trust Activities NoninterestExpenseFiduciaryAndTrustActivities	1400000	USD
CY2010	bmrc	Noninterest Expense Fiduciary And Trust Activities NoninterestExpenseFiduciaryAndTrustActivities	1300000	USD
CY2011	bmrc	Noninterest Expense Fiduciary And Trust Activities NoninterestExpenseFiduciaryAndTrustActivities	1300000	USD
CY2012Q4	bmrc	Number Of Branches NumberOfBranches	2	branch
CY2011Q4	bmrc	Number Of Institutional Investors That Purchased Warrant NumberOfInstitutionalInvestorsThatPurchasedWarrant	2	investor
CY2012	bmrc	Number Of Securities Sold During Period NumberOfSecuritiesSoldDuringPeriod	1	security
CY2012	bmrc	Occupancy And Equipment OccupancyAndEquipment	4230000	USD
CY2010	bmrc	Occupancy And Equipment OccupancyAndEquipment	3576000	USD
CY2011	bmrc	Occupancy And Equipment OccupancyAndEquipment	4002000	USD
CY2011Q1	bmrc	Other Purchased Loans Accretable Yield OtherPurchasedLoansAccretableYield	17307000	USD
CY2011Q1	bmrc	Other Purchased Loans Acquired During Period At Acquisition At Fair Value OtherPurchasedLoansAcquiredDuringPeriodAtAcquisitionAtFairValue	52395000	USD
CY2011Q1	bmrc	Other Purchased Loans Acquired During Period Cash Flows Expected To Be Collected At Acquisition OtherPurchasedLoansAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	69702000	USD
CY2011Q1	bmrc	Other Purchased Loans Acquired During Period Contractually Required Payments Receivable At Acquisition OtherPurchasedLoansAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	69702000	USD
CY2011Q1	bmrc	Other Purchased Loans Nonaccretable Difference OtherPurchasedLoansNonaccretableDifference	0	USD
CY2012Q4	bmrc	Other Time Accounts OtherTimeAccounts	141056000	USD
CY2011Q4	bmrc	Other Time Accounts OtherTimeAccounts	152000000	USD
CY2011Q1	bmrc	Purchased Credit Impaired Loans And Other Purchased Loans Accretable Yield PurchasedCreditImpairedLoansAndOtherPurchasedLoansAccretableYield	19209000	USD
CY2011Q1	bmrc	Purchased Credit Impaired Loans And Other Purchased Loans Acquired During Period At Acquisition At Fair Value PurchasedCreditImpairedLoansAndOtherPurchasedLoansAcquiredDuringPeriodAtAcquisitionAtFairValue	61765000	USD
CY2011Q1	bmrc	Purchased Credit Impaired Loans And Other Purchased Loans Acquired During Period Cash Flows Expected To Be Collected At Acquisition PurchasedCreditImpairedLoansAndOtherPurchasedLoansAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	80974000	USD
CY2011Q1	bmrc	Purchased Credit Impaired Loans And Other Purchased Loans Acquired During Period Contractually Required Payments Receivable At Acquisition PurchasedCreditImpairedLoansAndOtherPurchasedLoansAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	94018000	USD
CY2011Q1	bmrc	Purchased Credit Impaired Loans And Other Purchased Loans Nonaccretable Difference PurchasedCreditImpairedLoansAndOtherPurchasedLoansNonaccretableDifference	13044000	USD
CY2010	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue	6.70
CY2011	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue	7.51
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue	8.19
CY2010	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageGrantDateFairValue	8.31
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageGrantDateFairValue	8.00
CY2011	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageGrantDateFairValue	7.07
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures Expirations And Cancellations Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresExpirationsAndCancellationsIntrinsicValue	4000	USD
CY2011	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures Expirations And Cancellations Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresExpirationsAndCancellationsIntrinsicValue	6000	USD
CY2010	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures Expirations And Cancellations Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresExpirationsAndCancellationsIntrinsicValue	78000	USD
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Granted Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedIntrinsicValue	0	USD
CY2010	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Granted Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedIntrinsicValue	67000	USD
CY2011	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Granted Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedIntrinsicValue	3000	USD
CY2012Q4	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfShares	68301	shares
CY2011Q4	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfShares	72817	shares
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Options Forfeited Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares	640	shares
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	8.00
CY2012Q4	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	8.98
CY2011Q4	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	8.18
CY2010	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	8.39
CY2011	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	8.66
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	8.82
CY2009	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	8.10
CY2012Q4	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageGrantDateFairValue	8.77
CY2011Q4	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageGrantDateFairValue	8.81
CY2010Q4	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageGrantDateFairValue	8.84
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Vested Number Of Shares ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfShares	27806	shares
CY2012	bmrc	Share Based Compensation Arrangement By Share Based Payment Award Options Vested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	7.63
CY2012Q4	bmrc	Short Term Investments And Federal Funds Sold ShortTermInvestmentsAndFederalFundsSold	0	USD
CY2011Q4	bmrc	Short Term Investments And Federal Funds Sold ShortTermInvestmentsAndFederalFundsSold	2011000	USD
CY2012	bmrc	Stock Issued During Period Value Nonemployee Director Stock Purchase Plans StockIssuedDuringPeriodValueNonemployeeDirectorStockPurchasePlans	4000	USD
CY2011	bmrc	Stock Issued In Payment Of Director Fees StockIssuedInPaymentOfDirectorFees	200000	USD
CY2012	bmrc	Stock Issued In Payment Of Director Fees StockIssuedInPaymentOfDirectorFees	199000	USD
CY2010	bmrc	Stock Issued In Payment Of Director Fees StockIssuedInPaymentOfDirectorFees	200000	USD
CY2012Q4	bmrc	Threshold Requiring Collateral To Be Posted Derivatives In Liability Position ThresholdRequiringCollateralToBePostedDerivativesInLiabilityPosition	1300000	USD
CY2012Q4	bmrc	Threshold Requiring Collateral To Be Posted Liability Position Derivatives ThresholdRequiringCollateralToBePostedLiabilityPositionDerivatives	100000	USD
CY2012Q4	bmrc	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	328000	USD
CY2012	bmrc	Visa Class B Common Stock Conversion Ratio VisaClassBCommonStockConversionRatio	0.4206
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001403475
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	5420226	shares
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	192000000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	Bank of Marin Bancorp
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No

Files In Submission

Name	View Source	Status
0001403475-13-000017-index-headers.html	Edgar Link	pending
0001403475-13-000017-index.html	Edgar Link	pending
0001403475-13-000017.txt	Edgar Link	pending
0001403475-13-000017-xbrl.zip	Edgar Link	pending
bmrc-20121231.xml	Edgar Link	completed
bmrc-20121231.xsd	Edgar Link	pending
bmrc-20121231x10k.htm	Edgar Link	pending
bmrc-20121231_cal.xml	Edgar Link	unprocessable
bmrc-20121231_def.xml	Edgar Link	unprocessable
bmrc-20121231_lab.xml	Edgar Link	unprocessable
bmrc-20121231_pre.xml	Edgar Link	unprocessable
bmrc-ex2301_20121231x10k.htm	Edgar Link	pending
bmrc-ex3101_20121231x10k.htm	Edgar Link	pending
bmrc-ex3102_20121231x10k.htm	Edgar Link	pending
bmrc-ex3201_20121231x10k.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
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R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
stockpriceperformancegraph01.jpg	Edgar Link	pending

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$BMRC
Bank of Marin Bancorp Stock $bmrc

2012 Q4 Form 10-K Financial Statement

#000140347513000017 Filed on March 14, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BMRC Bank of Marin Bancorp Stock $bmrc

2012 Q4 Form 10-K Financial Statement

#000140347513000017 Filed on March 14, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BMRC
Bank of Marin Bancorp Stock $bmrc