$COLB
COLUMBIA BANKING SYSTEM, INC. Stock $colb

$colb Overview Financials Valuation SEC Filings Company Website

2011 Q3 Form 10-Q Financial Statement

#000088734311000010 Filed on November 08, 2011

Income Statement

Concept	2011 Q3	2010 Q3	2010 Q2
Revenue	$68.43M	$52.08M	$46.15M
YoY Change	31.41%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$2.195M	$2.477M
YoY Change	-11.38%
% of Gross Profit
Depreciation & Amortization	$6.700M	$4.000M	$3.200M
YoY Change	67.5%	100.0%	88.24%
% of Gross Profit
Operating Expenses	$2.195M	$2.477M
YoY Change	-11.38%
Operating Profit
YoY Change
Interest Expense	$3.644M	$5.110M	$5.416M
YoY Change	-28.69%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$26.12M	$9.175M	$5.724M
YoY Change	184.64%	-378.03%	-153.0%
Income Tax	$7.244M	$3.971M	$668.0K
% Of Pretax Income	27.74%	43.28%	11.67%
Net Earnings	$18.87M	$5.204M	$5.056M
YoY Change	262.64%	-446.93%	-191.93%
Net Earnings / Revenue	27.58%	9.99%	10.96%
Basic Earnings Per Share	$0.48	$0.06	$0.11
Diluted Earnings Per Share	$0.48	$0.06	$0.11
COMMON SHARES
Basic Shares Outstanding	39.13M shares	38.98M shares
Diluted Shares Outstanding	39.19M shares	39.14M shares

Balance Sheet

Concept	2011 Q3	2010 Q3	2010 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$347.5M	$526.1M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$105.0M	$63.00M	$61.00M
YoY Change	66.63%	0.0%	-3.17%
Goodwill	$118.4M	$109.6M	$109.6M
YoY Change	8.02%
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	$4.756B	$4.245B	$4.289B
YoY Change	12.03%	34.04%	41.93%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$25.00M	$27.00M	$25.00M
YoY Change	-7.41%	8.0%	0.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$25.00M	$27.00M	$25.00M
YoY Change	-7.41%	8.0%	0.0%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$26.00M	$26.00M
YoY Change	-100.0%	0.0%	0.0%
Other Long-Term Liabilities	$63.00M	$62.00M	$52.00M
YoY Change	1.61%	40.91%	15.56%
Total Long-Term Liabilities	$63.00M	$88.00M	$78.00M
YoY Change	-28.41%	25.71%	9.86%
TOTAL LIABILITIES
Total Short-Term Liabilities	$25.00M	$27.00M	$25.00M
Total Long-Term Liabilities	$63.00M	$88.00M	$78.00M
Total Liabilities	$4.006B	$3.541B	$3.514B
YoY Change	13.13%	34.18%	34.64%
SHAREHOLDERS EQUITY
Retained Earnings	$145.5M
YoY Change
Common Stock	$578.8M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$750.0M	$704.7M	$775.0M
YoY Change
Total Liabilities & Shareholders Equity	$4.756B	$4.245B	$4.289B
YoY Change	12.03%	34.04%	41.93%

Cashflow Statement

Concept	2011 Q3	2010 Q3	2010 Q2
OPERATING ACTIVITIES
Net Income	$18.87M	$5.204M	$5.056M
YoY Change	262.64%	-446.93%	-191.93%
Depreciation, Depletion And Amortization	$6.700M	$4.000M	$3.200M
YoY Change	67.5%	100.0%	88.24%
Cash From Operating Activities	$27.70M	$43.30M	$9.800M
YoY Change	-36.03%	230.53%	-36.36%
INVESTING ACTIVITIES
Capital Expenditures	-$8.400M	-$2.300M	-$1.300M
YoY Change	265.22%	187.5%	-62.86%
Acquisitions
YoY Change
Other Investing Activities	$195.3M	$53.50M	$40.30M
YoY Change	265.05%	-187.13%	-15.69%
Cash From Investing Activities	$186.9M	$51.30M	$39.00M
YoY Change	264.33%	-182.61%	-11.96%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$229.1M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-136.5M	-65.50M	141.8M
YoY Change	108.4%	-145.74%	-1084.72%
NET CHANGE
Cash From Operating Activities	27.70M	43.30M	9.800M
Cash From Investing Activities	186.9M	51.30M	39.00M
Cash From Financing Activities	-136.5M	-65.50M	141.8M
Net Change In Cash	78.10M	29.10M	190.6M
YoY Change	168.38%	-69.11%	320.75%
FREE CASH FLOW
Cash From Operating Activities	$27.70M	$43.30M	$9.800M
Capital Expenditures	-$8.400M	-$2.300M	-$1.300M
Free Cash Flow	$36.10M	$45.60M	$11.10M
YoY Change	-20.83%	228.06%	-41.27%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	63855000	USD
CY2011Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	25687000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	12281000	USD
	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	-13000	USD
	us-gaap	Advertising Expense AdvertisingExpense	2253000	USD
	us-gaap	Advertising Expense AdvertisingExpense	3050000	USD
CY2011Q3	us-gaap	Advertising Expense AdvertisingExpense	1137000	USD
CY2010Q3	us-gaap	Advertising Expense AdvertisingExpense	630000	USD
	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	390000	USD
CY2011Q3	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	0	USD
CY2010Q3	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	350000	USD
	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	295000	USD
	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	37500000	USD
CY2011Q3	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	500000	USD
CY2010Q3	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	9000000	USD
	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Gross AllowanceForLoanAndLeaseLossesProvisionForLossGross	2650000	USD
CY2011Q3	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-737000	USD
	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-2822000	USD
CY2010Q3	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-1126000	USD
	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-3432000	USD
CY2011Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4872000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	31466000	USD
CY2010Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	167907000	USD
CY2011Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	134108000	USD
CY2011Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	131656000	USD
CY2010Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	163559000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	16653000	USD
CY2011Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2452000	USD
CY2010Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	4348000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	168119000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	176815000	USD
CY2010Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	7540000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2886000	USD
CY2010Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1044000	USD
CY2011Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1177000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3116000	USD
CY2010Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	62000	shares
CY2011Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	75000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	54000	shares
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	91742000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	94242000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	647405000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	677330000	USD
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	62000	shares
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	3500000	USD
CY2010Q4	us-gaap	Assets Assets	4256363000	USD
CY2011Q3	us-gaap	Assets Assets	4755832000	USD
CY2011Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	995854000	USD
CY2010Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	763866000	USD
CY2011Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	954415000	USD
CY2010Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	743928000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	951134000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	43868000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	44136000	USD
CY2011Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	992523000	USD
CY2010Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	763866000	USD
CY2011Q3	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	995854000	USD
CY2010Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	3448000	USD
CY2011Q3	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	1048000	USD
CY2011Q3	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	438837000	USD
CY2011Q3	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses1 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses1	46000	USD
CY2010Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses1 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses1	318000	USD
CY2010Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses1 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1	3448000	USD
CY2011Q3	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses1 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1	1048000	USD
CY2010Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses1 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1	3130000	USD
CY2011Q3	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses1 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1	1002000	USD
CY2010Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	23386000	USD
CY2011Q3	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	42487000	USD
CY2010Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	521000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1541000	USD
CY2011Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	523000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1556000	USD
	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	1830000	USD
	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	9818000	USD
	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	155910000	USD
	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	247792000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	514130000	USD
CY2011Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	347462000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	305074000	USD
CY2010Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	526089000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-166668000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	221015000	USD
CY2011Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	97432000	USD
CY2010Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	55492000	USD
CY2010Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	256572000	USD
CY2011Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	282200000	USD
CY2011Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	314333000	USD
CY2011Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	23608000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	60369000	USD
CY2011Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	0	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	59811000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	24134000	USD
CY2011Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	8594000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	50320000	USD
CY2011Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	69000	USD
CY2011Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2010Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.03
CY2011Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
CY2011Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.05
CY2011Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.14
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.03
CY2010Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.01
CY2011Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.03
CY2011Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
CY2011Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
CY2010Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue
CY2011Q3	us-gaap	Common Stock No Par Value CommonStockNoParValue
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	44000	USD
CY2011Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	63033000	shares
CY2010Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	63033000	shares
CY2010Q4	us-gaap	Common Stock Value CommonStockValue	576905000	USD
CY2011Q3	us-gaap	Common Stock Value CommonStockValue	578828000	USD
CY2010Q3	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	2477000	USD
	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	6032000	USD
	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	6923000	USD
CY2011Q3	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	2195000	USD
CY2010Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	9734000	USD
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	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	29136000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	46689000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-394000	USD
CY2010Q4	us-gaap	Deposits Deposits	3327269000	USD
CY2011Q3	us-gaap	Deposits Deposits	3795499000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	10105000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2612000	USD
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Accounting Pronouncements Recently Issued</font></div><div style="line-height:120%;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;padding-bottom:16px;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In April 2011, the FASB issued Accounting Standards Update ("ASU") 2011-03, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Reconsideration of Effective Control for Repurchase Agreements</font><font style="font-family:inherit;font-size:10pt;"> (Topic 860). ASU 2011-03 attempts to improve the accounting for repurchase agreements and other agreements that both entitle and obligate a transferor to repurchase or redeem financial assets before maturity. The effective date of ASU 2011-03 will be the first interim or annual period beginning after December 15, 2011 and should be applied prospectively to transactions or modifications of existing transactions that occur on or after the effective date. Early adoption is not permitted. The Company is evaluating the impact this ASU will have on its financial condition and results of operations. </font></div><div style="line-height:120%;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In April 2011, the Financial Accounting Standards Board issued ASU 2011-02, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">A Creditor's Determination of Whether a Restructuring is a Troubled Debt Restructuring</font><font style="font-family:inherit;font-size:10pt;"> (Topic 310). ASU 2011-02 clarifies the criteria for a restructuring to be classified as a Troubled Debt Restructuring ("TDR"). The Company adopted this ASU during the current period as well as the related disclosure requirements which were included in ASU 2010-20, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Disclosures about the Credit Quality of Financing Receivables and the Allowance for Credit Losses</font><font style="font-family:inherit;font-size:10pt;"> (Topic 310). Adoption of this ASU had no impact on the Company's financial condition or results of operations. See Note 6 for expanded disclosure requirements related to TDR.</font></div><div style="line-height:120%;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In May 2011, the FASB issued ASU 2011-04, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. Generally Accepted Accounting Principles </font><font style="font-family:inherit;font-size:10pt;">(“GAAP”)</font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> and International Financial Reporting Standards </font><font style="font-family:inherit;font-size:10pt;">(“IFRS”) (Topic 820). ASU 2011-04 developed common requirements between GAAP and IFRS for measuring fair value and for disclosing information about fair value measurements. The effective date of ASU 2011-04 will be during interim or annual period beginning after December 15, 2011 and should be applied prospectively to transactions or modifications of existing transactions that occur on or after the effective date. Early adoption is not permitted. The Company is evaluating the impact this ASU will have on its financial condition and results of operations.</font></div><div style="line-height:120%;text-align:left;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In June 2011, the FASB issued ASU 2011-05, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Presentation of Comprehensive Income</font><font style="font-family:inherit;font-size:10pt;"> (Topic 220). ASU 2011-05 attempts to improve the comparability, consistency, and transparency of financial reporting and to increase the prominence of items reported in other comprehensive income. The effective date of ASU 2011-05 will be the first interim or fiscal period beginning after December 15, 2011 and should be applied retrospectively. Early adoption is permitted. The Company will apply the disclosure requirements of ASU 2011-05 for its first interim period beginning after December 15, 2011. </font></div><div style="line-height:120%;padding-top:12px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In September 2011, the FASB issued ASU 2011-08, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Testing Goodwill for Impairment </font><font style="font-family:inherit;font-size:10pt;">(Topic 350). ASU 2011-08 permits an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test. ASU 2011-08 is effective for interim and annual periods beginning after December 15, 2011. Early adoption is permitted. This ASU, which the Company adopted during the third quarter of 2011, did not have any impact on the Company's consolidated financial statements.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>
	us-gaap	Dilutive Securities DilutiveSecurities	204000	USD
CY2011Q3	us-gaap	Dilutive Securities DilutiveSecurities	61000	USD
	us-gaap	Dilutive Securities DilutiveSecurities	75000	USD
CY2010Q3	us-gaap	Dilutive Securities DilutiveSecurities	161000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5524000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1068000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2349000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
CY2010Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2010Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	0	USD
	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	18384000	USD
CY2010Q3	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	6518000	USD
CY2010Q3	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	2051000	USD
	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	5700000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4910000	USD
CY2010Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1952000	USD
CY2011Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	574000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3553000	USD
CY2010Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	119405000	USD
CY2011Q3	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	122642000	USD
CY2010Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	17908000	USD
CY2011Q3	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	22215000	USD
CY2011Q3	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	6991000	USD
	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	19746000	USD
	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	5393000	USD
CY2011Q3	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	1952000	USD
CY2010Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1828071000	USD
CY2011Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2198303000	USD
CY2011Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	59596000	USD
CY2010Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	91173000	USD
CY2010Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	3464000	USD
CY2011Q3	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	7845000	USD
CY2011Q3	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	2665000	USD
CY2010Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	7117000	USD
CY2011Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	2192337000	USD
CY2010Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1819499000	USD
CY2011Q3	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	0	USD
CY2010Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	1000	USD
CY2011Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	55052000	USD
CY2010Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	89163000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	100000	USD
CY2010Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	10582000	USD
CY2011Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	10510000	USD
CY2011Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	9894000	USD
CY2010Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	7955000	USD
CY2009Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4032000	USD
CY2010Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5874000	USD
CY2011Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	21369000	USD
CY2010Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	18696000	USD
CY2010Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	20777000	USD
CY2011Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	18603000	USD
CY2010Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	19733000	USD
CY2009Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	4864000	USD
	us-gaap	Finite Lived Intangible Assets Useful Life FiniteLivedIntangibleAssetsUsefulLife	10
	us-gaap	Future Amortization Expense Year Five FutureAmortizationExpenseYearFive	2645000	USD
	us-gaap	Future Amortization Expense Year Four FutureAmortizationExpenseYearFour	3397000	USD
	us-gaap	Future Amortization Expense Year One FutureAmortizationExpenseYearOne	1203000	USD
	us-gaap	Future Amortization Expense Year Three FutureAmortizationExpenseYearThree	3964000	USD
	us-gaap	Future Amortization Expense Year Two FutureAmortizationExpenseYearTwo	4445000	USD
	us-gaap	Gain From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness GainFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectiveness	1463000	USD
	us-gaap	Gain From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness GainFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectiveness	222000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	13000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	16000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	0	USD
CY2011Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	0	USD
CY2010Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	0	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	58000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	3527000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	7069000	USD
CY2010Q4	us-gaap	Goodwill Goodwill	109639000	USD
CY2011Q3	us-gaap	Goodwill Goodwill	118434000	USD
CY2010Q3	us-gaap	Goodwill Goodwill	109639000	USD
CY2011Q2	us-gaap	Goodwill Goodwill	118434000	USD
CY2009Q4	us-gaap	Goodwill Goodwill	95519000	USD
CY2010Q2	us-gaap	Goodwill Goodwill	109639000	USD
CY2011Q3	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2010Q3	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	8795000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	14120000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	74253000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1029000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	4586000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	5392000	USD
CY2010Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	9175000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22749000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	45524000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	0	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	26116000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4573000	USD
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7244000	USD
CY2010Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3971000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12241000	USD
CY2010Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	716000	USD
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	2215000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-226000	USD
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	2131000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	12870000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	3015000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-323141000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-215701000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	3384000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-4195000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-625000	USD
	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	-1814000	USD
	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	-1513000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-5886000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	251000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1608000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	22053000	USD
CY2011Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	68432000	USD
CY2010Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	52075000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	176352000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	142510000	USD
CY2010Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	44882000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	151446000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	120769000	USD
CY2011Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	59655000	USD
CY2011Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2690330000	USD
CY2010Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2431598000	USD
CY2010Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	458638000	USD
CY2011Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	250030000	USD
	us-gaap	Interest Expense InterestExpense	16539000	USD
	us-gaap	Interest Expense InterestExpense	11740000	USD
CY2010Q3	us-gaap	Interest Expense InterestExpense	5110000	USD
CY2011Q3	us-gaap	Interest Expense InterestExpense	3644000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	13282000	USD
CY2011Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2642000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	8569000	USD
CY2010Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4007000	USD
CY2011Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	807000	USD
CY2011Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	75000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	579000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	769000	USD
CY2010Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	266000	USD
	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	357000	USD
	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	377000	USD
CY2010Q3	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	121000	USD
CY2011Q3	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	120000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-86000	USD
CY2010Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	37512000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1599000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-943000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	88018000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	159650000	USD
CY2011Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64788000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	164612000	USD
CY2010Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	46965000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	125971000	USD
CY2011Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2500000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	7483000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	6988000	USD
CY2010Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2252000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	14113000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	16701000	USD
CY2011Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	6037000	USD
CY2010Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4660000	USD
	us-gaap	Interest Paid Net InterestPaidNet	17164000	USD
	us-gaap	Interest Paid Net InterestPaidNet	11967000	USD
CY2011Q3	us-gaap	Interest Receivable InterestReceivable	17428000	USD
CY2010Q4	us-gaap	Interest Receivable InterestReceivable	11164000	USD
CY2010Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	17574000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	52057000	USD
CY2011Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	21392000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	59772000	USD
CY2010Q4	us-gaap	Liabilities Liabilities	3549485000	USD
CY2011Q3	us-gaap	Liabilities Liabilities	4005866000	USD
CY2011Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4755832000	USD
CY2010Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4256363000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	60993000	USD
CY2011Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	50422000	USD
CY2010Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	62334000	USD
CY2010Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	59748000	USD
CY2009Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	53478000	USD
CY2011Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	54057000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Consumer LoansAndLeasesReceivableConsumer	182017000	USD
CY2011Q3	us-gaap	Loans And Leases Receivable Consumer LoansAndLeasesReceivableConsumer	176667000	USD
CY2011Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	23764000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	3490000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1915754000	USD
CY2011Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2257899000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2371822000	USD
CY2011Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2778282000	USD
CY2011Q3	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	9500000	USD
CY2010Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	12900000	USD
	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	3100000	USD
	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	6500000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	-642000	USD
CY2011Q3	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	2568000	USD
CY2011Q3	us-gaap	Loans Receivable Net LoansReceivableNet	2257899000	USD
CY2011Q3	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	983820000	USD
CY2010Q4	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	795369000	USD
CY2010Q4	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	754000	USD
CY2010Q4	us-gaap	Loans Receivable Net LoansReceivableNet	1919244000	USD
	us-gaap	Noninterest Income NoninterestIncome	36893000	USD
CY2010Q4	us-gaap	Long Term Debt LongTermDebt	25735000	USD
CY2011Q3	us-gaap	Long Term Debt LongTermDebt	0	USD
	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	58000	USD
	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	0	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-213592000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-285547000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	48675000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	353128000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	70204000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	81479000	USD
CY2010Q3	us-gaap	Net Income Loss NetIncomeLoss	5204000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	18872000	USD
	us-gaap	Net Income Loss NetIncomeLoss	33283000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18176000	USD
CY2011Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	18872000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	13229000	USD
CY2010Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2474000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	33283000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	1075166000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	485870000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	1210882000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	731832000	USD
CY2010Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	895671000	USD
CY2011Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1105169000	USD
CY2011Q3	us-gaap	Noninterest Expense NoninterestExpense	39935000	USD
	us-gaap	Noninterest Expense NoninterestExpense	114445000	USD
CY2010Q3	us-gaap	Noninterest Expense NoninterestExpense	33520000	USD
	us-gaap	Noninterest Expense NoninterestExpense	102162000	USD
CY2011Q3	us-gaap	Noninterest Income NoninterestIncome	2196000	USD
	us-gaap	Noninterest Income NoninterestIncome	319000	USD
CY2010Q3	us-gaap	Noninterest Income NoninterestIncome	5183000	USD
CY2011Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	1755000	USD
CY2010Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	629000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	3842000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	2529000	USD
CY2011Q3	us-gaap	Occupancy Net OccupancyNet	4815000	USD
CY2010Q3	us-gaap	Occupancy Net OccupancyNet	4278000	USD
	us-gaap	Occupancy Net OccupancyNet	13600000	USD
	us-gaap	Occupancy Net OccupancyNet	12554000	USD
CY2011Q3	us-gaap	Other Assets OtherAssets	103486000	USD
CY2010Q4	us-gaap	Other Assets OtherAssets	103851000	USD
CY2010Q4	us-gaap	Other Borrowings OtherBorrowings	642000	USD
CY2011Q3	us-gaap	Other Borrowings OtherBorrowings	0	USD
CY2011Q3	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	14000	USD
	colb	Provision For Losses On Covered Loans ProvisionForLossesOnCoveredLoans	2312000	USD
	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	21000	USD
	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	41000	USD
	us-gaap	Other Comprehensive Income Available For Sale Securities Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease	13768000	USD
	us-gaap	Other Comprehensive Income Available For Sale Securities Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease	11859000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	7000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Available For Sale Securities Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease	4988000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	14000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Available For Sale Securities Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease	4739000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	-219000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	20000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	0	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-143000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	0	USD
CY2010Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease	7000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	-943000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	-143000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	-216000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease	0	USD
CY2011Q3	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	0	USD
CY2010Q3	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	119000	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	0	USD
	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease	520000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax Effect OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostTaxEffect	0	USD
	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax Effect OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostTaxEffect	0	USD
CY2010Q3	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax Effect OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostTaxEffect	0	USD
	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax Effect OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostTaxEffect	11000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-38000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	0	USD
CY2011Q3	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	0	USD
CY2011Q3	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	0	USD
CY2010Q3	us-gaap	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	0	USD
CY2010Q3	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-216000	USD
CY2010Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	4739000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	13768000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	11897000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	4988000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	6553000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2010Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2611000	USD
CY2010Q4	us-gaap	Other Liabilities OtherLiabilities	51434000	USD
CY2011Q3	us-gaap	Other Liabilities OtherLiabilities	62725000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	11836000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	12045000	USD
CY2010Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3661000	USD
CY2011Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3550000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	726000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	1147000	USD
	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	39447000	USD
	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	32000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1068000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5524000	USD
	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Net Of Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodNetOfTax	23000	USD
	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Net Of Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodNetOfTax	-260000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
CY2011Q3	us-gaap	Pledged Financial Instruments Not Separately Reported Loans Receivable Pledged For Federal Home Loan Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivablePledgedForFederalHomeLoanBankDebt	401600000	USD
CY2010Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2730000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	4947000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	2840000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	64054000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	294678000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3910000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10619000	USD
CY2010Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Loans Receivable Pledged For Federal Home Loan Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivablePledgedForFederalHomeLoanBankDebt	426600000	USD
	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodTax	12000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	229129000	USD
CY2011Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	100000	USD
	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodTax	0	USD
	us-gaap	Proceeds From Loan And Lease Originations And Principal Collections ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections	-114618000	USD
	us-gaap	Proceeds From Loan And Lease Originations And Principal Collections ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections	69420000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	66118000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	101071000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-25735000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	18872000	USD
CY2010Q3	us-gaap	Profit Loss ProfitLoss	5204000	USD
	us-gaap	Profit Loss ProfitLoss	33283000	USD
	us-gaap	Profit Loss ProfitLoss	18176000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	69328000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	0	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	10234000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	3943000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	59000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	71000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	851000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	792000	USD
	us-gaap	Professional Fees ProfessionalFees	4868000	USD
CY2011Q3	us-gaap	Professional Fees ProfessionalFees	1957000	USD
CY2010Q3	us-gaap	Professional Fees ProfessionalFees	1609000	USD
	us-gaap	Professional Fees ProfessionalFees	4584000	USD
CY2010Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	93108000	USD
CY2011Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	104974000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	37500000	USD
CY2011Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	500000	USD
CY2010Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9000000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2650000	USD
CY2010Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	45434000	USD
CY2011Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	49891000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	100000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	36237000	USD
CY2010Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	117692000	USD
CY2011Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	145451000	USD
CY2010Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	25000000	USD
CY2011Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	25000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1054000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1163000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	229129000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	1163000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	1054000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	864000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	792000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	-32000	USD
CY2011Q3	us-gaap	Stockholders Equity StockholdersEquity	749966000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	706878000	USD
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	528139000	USD
CY2010Q3	us-gaap	Stockholders Equity StockholdersEquity	704692000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33938000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39092000	shares
CY2010Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38976000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39131000	shares
	colb	Accretion Of Preferred Stock Discount AccretionOfPreferredStockDiscount	0	USD
CY2010Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	39137000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	39167000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	39192000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34142000	shares
CY2011Q3	colb	Acquisition Accounting Valuation Discount On Covered Loans AcquisitionAccountingValuationDiscountOnCoveredLoans	218993000	USD
CY2010Q4	colb	Acquisition Accounting Valuation Discount On Covered Loans AcquisitionAccountingValuationDiscountOnCoveredLoans	191617000	USD
CY2010Q4	colb	Allowance For Losses On Covered Loans AllowanceForLossesOnCoveredLoans	6055000	USD
CY2011Q3	colb	Allowance For Losses On Covered Loans AllowanceForLossesOnCoveredLoans	8327000	USD
CY2010Q4	colb	Allowance For Unfunded Loan Commitments And Letters Of Credit AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit	1165000	USD
CY2010Q3	colb	Allowance For Unfunded Loan Commitments And Letters Of Credit AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit	1165000	USD
CY2009Q4	colb	Allowance For Unfunded Loan Commitments And Letters Of Credit AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit	775000	USD
CY2011Q2	colb	Allowance For Unfunded Loan Commitments And Letters Of Credit AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit	1460000	USD
CY2011Q3	colb	Allowance For Unfunded Loan Commitments And Letters Of Credit AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit	1460000	USD
CY2010Q2	colb	Allowance For Unfunded Loan Commitments And Letters Of Credit AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit	815000	USD
CY2011Q3	colb	Amount Of Estimated Clawback Liability AmountOfEstimatedClawbackLiability	3300000	USD
	colb	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	13102000	USD
CY2010Q3	colb	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	2452000	USD
	colb	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	32972000	USD
CY2011Q3	colb	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	18695000	USD
	colb	Change In Federal Deposit Insurance Corporation Loss Sharing Asset ChangeInFederalDepositInsuranceCorporationLossSharingAsset	-1137000	USD
	colb	Change In Federal Deposit Insurance Corporation Loss Sharing Asset ChangeInFederalDepositInsuranceCorporationLossSharingAsset	-32048000	USD
CY2011Q3	colb	Change In Federal Deposit Insurance Corporation Loss Sharing Asset ChangeInFederalDepositInsuranceCorporationLossSharingAsset	-10855000	USD
CY2010Q3	colb	Change In Federal Deposit Insurance Corporation Loss Sharing Asset ChangeInFederalDepositInsuranceCorporationLossSharingAsset	-4536000	USD
CY2010Q4	colb	Federal Deposit Insurance Corporation Loss Sharing Asset FederalDepositInsuranceCorporationLossSharingAsset	205991000	USD
CY2011Q3	colb	Common Stock Shares Issued And Outstanding CommonStockSharesIssuedAndOutstanding	39502000	shares
CY2010Q4	colb	Common Stock Shares Issued And Outstanding CommonStockSharesIssuedAndOutstanding	39338000	shares
CY2010Q3	colb	Core Deposit Intangibles Current Period Amortization CoreDepositIntangiblesCurrentPeriodAmortization	1044000	USD
	colb	Core Deposit Intangibles Current Period Amortization CoreDepositIntangiblesCurrentPeriodAmortization	2886000	USD
	colb	Core Deposit Intangibles Current Period Amortization CoreDepositIntangiblesCurrentPeriodAmortization	3116000	USD
CY2011Q3	colb	Core Deposit Intangibles Current Period Amortization CoreDepositIntangiblesCurrentPeriodAmortization	1177000	USD
CY2010Q4	colb	Covered Loans CoveredLoans	714733000	USD
CY2011Q3	colb	Covered Loans CoveredLoans	798125000	USD
CY2011Q3	colb	Covered Loans Net CoveredLoansNet	570805000	USD
CY2010Q4	colb	Covered Loans Net CoveredLoansNet	517061000	USD
	colb	Diluted Earnings Allocated To Common Shareholders DilutedEarningsAllocatedToCommonShareholders	13102000	USD
CY2011Q3	colb	Diluted Earnings Allocated To Common Shareholders DilutedEarningsAllocatedToCommonShareholders	18695000	USD
	colb	Diluted Earnings Allocated To Common Shareholders DilutedEarningsAllocatedToCommonShareholders	32972000	USD
CY2010Q3	colb	Diluted Earnings Allocated To Common Shareholders DilutedEarningsAllocatedToCommonShareholders	2452000	USD
CY2010Q3	colb	Earnings Allocated To Participating Securities EarningsAllocatedToParticipatingSecurities	22000	USD
CY2011Q3	colb	Earnings Allocated To Participating Securities EarningsAllocatedToParticipatingSecurities	177000	USD
	colb	Earnings Allocated To Participating Securities EarningsAllocatedToParticipatingSecurities	311000	USD
	colb	Earnings Allocated To Participating Securities EarningsAllocatedToParticipatingSecurities	127000	USD
CY2011Q3	colb	Established Through Acquisitions EstablishedThroughAcquisitions	3943000	USD
	colb	Established Through Acquisitions EstablishedThroughAcquisitions	17755000	USD
CY2010Q3	colb	Established Through Acquisitions EstablishedThroughAcquisitions	0	USD
	colb	Established Through Acquisitions EstablishedThroughAcquisitions	5789000	USD
	colb	Fdic Clawback Liability FDICClawbackLiability	3294000	USD
	colb	Fdic Clawback Liability FDICClawbackLiability	0	USD
CY2011Q3	colb	Fdic Clawback Liability FDICClawbackLiability	1146000	USD
CY2010Q3	colb	Fdic Clawback Liability FDICClawbackLiability	0	USD
	colb	Fdic Reimbursement On Loss Sharing Asset FDICReimbursementOnLossSharingAsset	0	USD
	colb	Fdic Reimbursement On Loss Sharing Asset FDICReimbursementOnLossSharingAsset	51000000	USD
CY2011Q3	colb	Federal Deposit Insurance Corporation Loss Sharing Asset FederalDepositInsuranceCorporationLossSharingAsset	193869000	USD
CY2010Q4	colb	Financing Receivable Unpaid Principal Balance Nonaccrual Status FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus	127001000	USD
CY2011Q3	colb	Financing Receivable Unpaid Principal Balance Nonaccrual Status FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus	89782000	USD
CY2010Q3	colb	Gain On Bank Acquisitions GainOnBankAcquisitions	0	USD
CY2011Q3	colb	Federal Deposit Insurance Corporation Loss Sharing Indemnified Assets FederalDepositInsuranceCorporationLossSharingIndemnifiedAssets	186500000	USD
CY2011Q3	colb	Federal Deposit Insurance Corporation Loss Sharing Indemnified Assets Receivable FederalDepositInsuranceCorporationLossSharingIndemnifiedAssetsReceivable	7400000	USD
CY2011Q3	colb	Financing Receivable Modifications Additional Commitment To Lend FinancingReceivableModificationsAdditionalCommitmentToLend	2400000	USD
CY2011Q3	colb	Financing Receivable Modifications Number Of Contracts Duration FinancingReceivableModificationsNumberOfContractsDuration	1	Modifications
	colb	Financing Receivable Modifications Number Of Contracts Duration FinancingReceivableModificationsNumberOfContractsDuration	5	Modifications
CY2011Q3	colb	Financing Receivable Modifications Post Modification Recorded Investment Duration FinancingReceivableModificationsPostModificationRecordedInvestmentDuration	226000	USD
	colb	Financing Receivable Modifications Post Modification Recorded Investment Duration FinancingReceivableModificationsPostModificationRecordedInvestmentDuration	1237000	USD
CY2011Q3	colb	Financing Receivable Modifications Pre Modification Recorded Investment Duration FinancingReceivableModificationsPreModificationRecordedInvestmentDuration	226000	USD
	colb	Financing Receivable Modifications Pre Modification Recorded Investment Duration FinancingReceivableModificationsPreModificationRecordedInvestmentDuration	1237000	USD
CY2010Q4	colb	Financing Receivable Recorded Investment Nonaccrual Loans FinancingReceivableRecordedInvestmentNonaccrualLoans	89301000	USD
CY2011Q3	colb	Financing Receivable Recorded Investment Nonaccrual Loans FinancingReceivableRecordedInvestmentNonaccrualLoans	55052000	USD
CY2011Q3	colb	Gain On Bank Acquisitions GainOnBankAcquisitions	1830000	USD
	colb	Gain On Bank Acquisitions GainOnBankAcquisitions	1830000	USD
	colb	Gain On Bank Acquisitions GainOnBankAcquisitions	9818000	USD
CY2011Q3	colb	Goodwill And Intangible Assets Total GoodwillAndIntangibleAssetsTotal	139803000	USD
CY2010Q3	colb	Goodwill And Intangible Assets Total GoodwillAndIntangibleAssetsTotal	129372000	USD
CY2010Q4	colb	Gross Core Deposit Intangible Balance GrossCoreDepositIntangibleBalance	26651000	USD
CY2009Q4	colb	Gross Core Deposit Intangible Balance GrossCoreDepositIntangibleBalance	8896000	USD
CY2010Q2	colb	Gross Core Deposit Intangible Balance GrossCoreDepositIntangibleBalance	26651000	USD
CY2011Q2	colb	Gross Core Deposit Intangible Balance GrossCoreDepositIntangibleBalance	28497000	USD
	colb	Increase Decrease In Fdic Loss Sharing Asset Net Of Cash Received IncreaseDecreaseInFDICLossSharingAssetNetOfCashReceived	-1022000	USD
	colb	Increase Decrease In Fdic Loss Sharing Asset Net Of Cash Received IncreaseDecreaseInFDICLossSharingAssetNetOfCashReceived	-29856000	USD
	colb	Interest Income Federal Funds Sold And Deposits In Banks InterestIncomeFederalFundsSoldAndDepositsInBanks	640000	USD
CY2011Q3	colb	Interest Income Federal Funds Sold And Deposits In Banks InterestIncomeFederalFundsSoldAndDepositsInBanks	240000	USD
	colb	Interest Income Federal Funds Sold And Deposits In Banks InterestIncomeFederalFundsSoldAndDepositsInBanks	722000	USD
CY2010Q3	colb	Interest Income Federal Funds Sold And Deposits In Banks InterestIncomeFederalFundsSoldAndDepositsInBanks	281000	USD
CY2010Q4	colb	Loans Excluding Covered Loans Net LoansExcludingCoveredLoansNet	1854761000	USD
CY2011Q3	colb	Loans Excluding Covered Loans Net LoansExcludingCoveredLoansNet	2207477000	USD
CY2010Q4	colb	Loans Receivable Real Estate Construction LoansReceivableRealEstateConstruction	98146000	USD
CY2011Q3	colb	Loans Receivable Real Estate Construction LoansReceivableRealEstateConstruction	79468000	USD
CY2010Q4	colb	Loans Receivable Real Estate Mortgage LoansReceivableRealEstateMortgage	843712000	USD
CY2011Q3	colb	Loans Receivable Real Estate Mortgage LoansReceivableRealEstateMortgage	1041708000	USD
	colb	Merchant Processing MerchantProcessing	2697000	USD
CY2010Q3	colb	Merchant Processing MerchantProcessing	934000	USD
	colb	Merchant Processing MerchantProcessing	2764000	USD
CY2011Q3	colb	Merchant Processing MerchantProcessing	976000	USD
	colb	Negative Provision To Adjust Allowance For Loss NegativeProvisionToAdjustAllowanceForLoss	1200000	USD
	colb	Net Cost Of Operation Of Other Real Estate NetCostOfOperationOfOtherRealEstate	-423000	USD
CY2011Q3	colb	Net Cost Of Operation Of Other Real Estate NetCostOfOperationOfOtherRealEstate	-195000	USD
	colb	Net Cost Of Operation Of Other Real Estate NetCostOfOperationOfOtherRealEstate	-802000	USD
CY2010Q3	colb	Net Cost Of Operation Of Other Real Estate NetCostOfOperationOfOtherRealEstate	-1442000	USD
CY2010Q3	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Net Of Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodNetOfTax	0	USD
CY2011Q3	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Net Of Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodNetOfTax	0	USD
	colb	Proceeds From Sales Of Covered Other Real Estate Owned ProceedsFromSalesOfCoveredOtherRealEstateOwned	14604000	USD
	colb	Provision Expense On Covered Loans ProvisionExpenseOnCoveredLoans	2300000	USD
	colb	Provision For Loan Lease And Covered Loan Losses ProvisionForLoanLeaseAndCoveredLoanLosses	37953000	USD
	colb	Provision For Loan Lease And Covered Loan Losses ProvisionForLoanLeaseAndCoveredLoanLosses	4962000	USD
CY2011Q3	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodTax	0	USD
CY2010Q3	colb	Net Unrealized Gain Loss From Unfunded Defined Benefit Plan Liability Arising During Period Tax NetUnrealizedGainLossFromUnfundedDefinedBenefitPlanLiabilityArisingDuringPeriodTax	4000	USD
	colb	Payment For Repurchase Of Preferred Stock And Common Stock Warrants PaymentForRepurchaseOfPreferredStockAndCommonStockWarrants	0	USD
	colb	Payment For Repurchase Of Preferred Stock And Common Stock Warrants PaymentForRepurchaseOfPreferredStockAndCommonStockWarrants	80200000	USD
	colb	Percentage Of Assets Premium PercentageOfAssetsPremium	0.25
	colb	Percentage Of Clawback PercentageOfClawback	0.50
	colb	Percentage Of Loss Assumed By Federal Deposit Insurance Corporation On Sale Of Covered Other Real Estate Owned PercentageOfLossAssumedByFederalDepositInsuranceCorporationOnSaleOfCoveredOtherRealEstateOwned	0.80
CY2010	colb	Percentage Of Loss Assumed By Federal Deposit Insurance Corporation On Sale Of Covered Other Real Estate Owned If Minimum Loss Share Is Met PercentageOfLossAssumedByFederalDepositInsuranceCorporationOnSaleOfCoveredOtherRealEstateOwnedIfMinimumLossShareIsMet	0.95
CY2010	colb	Percentage Of Loss Recovery Agreement PercentageOfLossRecoveryAgreement	0.95
	colb	Percentage Of Loss Recovery Agreement PercentageOfLossRecoveryAgreement	0.80
	colb	Percentage Of Stated Threshold PercentageOfStatedThreshold	0.20
	colb	Percentage Of Unallocated Loan Amount PercentageOfUnallocatedLoanAmount	0.05
	colb	Proceeds From Sales Of Covered Other Real Estate Owned ProceedsFromSalesOfCoveredOtherRealEstateOwned	10652000	USD
CY2011Q3	colb	Provision For Losses On Covered Loans ProvisionForLossesOnCoveredLoans	433000	USD
	colb	Provision For Losses On Covered Loans ProvisionForLossesOnCoveredLoans	453000	USD
CY2010Q3	colb	Provision For Losses On Covered Loans ProvisionForLossesOnCoveredLoans	453000	USD
CY2011Q3	colb	Real Estate Acquired Through Foreclosure Covered By Fdic Loss Sharing Agreement RealEstateAcquiredThroughForeclosureCoveredByFdicLossSharingAgreement	24835000	USD
CY2010Q4	colb	Real Estate Acquired Through Foreclosure Covered By Fdic Loss Sharing Agreement RealEstateAcquiredThroughForeclosureCoveredByFdicLossSharingAgreement	14443000	USD
	colb	Recorded Investment Noncovered Loans RecordedInvestmentNoncoveredLoans	2257899000	USD
CY2010	colb	Recorded Investment Noncovered Loans RecordedInvestmentNoncoveredLoans	1927191000	USD
	colb	Taxes Licenses And Fees TaxesLicensesAndFees	2983000	USD
	colb	Taxes Licenses And Fees TaxesLicensesAndFees	2055000	USD
CY2010Q3	colb	Taxes Licenses And Fees TaxesLicensesAndFees	803000	USD
CY2011Q3	colb	Taxes Licenses And Fees TaxesLicensesAndFees	1211000	USD
	colb	Transfer From Loans To Foreclosed Assets TransferFromLoansToForeclosedAssets	16505000	USD
	colb	Transfer From Loans To Foreclosed Assets TransferFromLoansToForeclosedAssets	27266000	USD
	colb	Weighted Average Diluted Common Shares Outstanding WeightedAverageDilutedCommonSharesOutstanding	33938000	shares
CY2011Q3	colb	Weighted Average Diluted Common Shares Outstanding WeightedAverageDilutedCommonSharesOutstanding	39131000	shares
	colb	Weighted Average Diluted Common Shares Outstanding WeightedAverageDilutedCommonSharesOutstanding	39092000	shares
CY2010Q3	colb	Weighted Average Diluted Common Shares Outstanding WeightedAverageDilutedCommonSharesOutstanding	38976000	shares
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2011
	dei	Document Period End Date DocumentPeriodEndDate	2011-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000887343
CY2011Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	39496663	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	COLUMBIA BANKING SYSTEM INC

Files In Submission

Name	View Source	Status
0000887343-11-000010-index-headers.html	Edgar Link	pending
0000887343-11-000010-index.html	Edgar Link	pending
0000887343-11-000010.txt	Edgar Link	pending
0000887343-11-000010-xbrl.zip	Edgar Link	pending
colb-20110930.xml	Edgar Link	completed
colb-20110930.xsd	Edgar Link	pending
colb-20110930_cal.xml	Edgar Link	unprocessable
colb-20110930_def.xml	Edgar Link	unprocessable
colb-20110930_lab.xml	Edgar Link	unprocessable
colb-20110930_pre.xml	Edgar Link	unprocessable
colb0930201110-q.htm	Edgar Link	pending
colb09302011ex311.htm	Edgar Link	pending
colb09302011ex312.htm	Edgar Link	pending
colb09302011ex32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$COLB
COLUMBIA BANKING SYSTEM, INC. Stock $colb

2011 Q3 Form 10-Q Financial Statement

#000088734311000010 Filed on November 08, 2011

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COLB COLUMBIA BANKING SYSTEM, INC. Stock $colb

2011 Q3 Form 10-Q Financial Statement

#000088734311000010 Filed on November 08, 2011

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COLB
COLUMBIA BANKING SYSTEM, INC. Stock $colb