$PB
PROSPERITY BANCSHARES INC Stock $pb

$pb Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000119312513084693 Filed on February 28, 2013

Income Statement

Concept	2011 Q4	2010 Q4	2010
Revenue			$384.5M
YoY Change
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	$3.900M	$4.100M	$17.30M
YoY Change	-4.88%	-8.89%	-5.46%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense			$66.39M
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$54.60M	$49.30M	$191.8M
YoY Change	10.75%	6.94%	13.69%
Income Tax	$18.20M	$16.50M	$64.09M
% Of Pretax Income	33.33%	33.47%	33.42%
Net Earnings	$36.40M	$32.80M	$127.7M
YoY Change	10.98%	7.19%	14.13%
Net Earnings / Revenue			33.21%
Basic Earnings Per Share			$2.74
Diluted Earnings Per Share	$774.5K	$700.9K	$2.73
COMMON SHARES
Basic Shares Outstanding			46.62M shares
Diluted Shares Outstanding			46.83M shares

Balance Sheet

Concept	2011 Q4	2010 Q4	2010
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$213.4M	$159.4M
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	$159.7M	$159.0M	$159.0M
YoY Change	0.41%	6.71%	6.71%
Goodwill	$924.5M	$924.3M
YoY Change	0.03%
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	$9.823B	$9.477B	$9.477B
YoY Change	3.65%	7.08%	7.08%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.000M	$4.000M	$4.000M
YoY Change	-25.0%	-42.86%	-42.86%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$55.00M	$61.00M	$61.00M
YoY Change	-9.84%	-16.44%	-38.38%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$3.000M	$4.000M	$4.000M
YoY Change	-25.0%	-42.86%	-42.86%
LONG-TERM LIABILITIES
Long-Term Debt	$85.00M	$92.00M	$92.00M
YoY Change	-7.61%	0.0%	0.0%
Other Long-Term Liabilities	$40.00M	$38.00M	$38.00M
YoY Change	5.26%	-9.52%	-9.52%
Total Long-Term Liabilities	$125.0M	$130.0M	$130.0M
YoY Change	-3.85%	-2.99%	-2.99%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.000M	$4.000M	$4.000M
Total Long-Term Liabilities	$125.0M	$130.0M	$130.0M
Total Liabilities	$8.255B	$8.024B	$8.024B
YoY Change	2.88%	7.0%	7.0%
SHAREHOLDERS EQUITY
Retained Earnings	$623.9M
YoY Change
Common Stock	$46.95M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$607.0K	$607.0K
YoY Change	0.0%
Treasury Stock Shares	37.09K shares
Shareholders Equity	$1.567B	$1.452B	$1.452B
YoY Change
Total Liabilities & Shareholders Equity	$9.823B	$9.477B	$9.477B
YoY Change	3.65%	7.08%	7.08%

Cashflow Statement

Concept	2011 Q4	2010 Q4	2010
OPERATING ACTIVITIES
Net Income	$36.40M	$32.80M	$127.7M
YoY Change	10.98%	7.19%	14.13%
Depreciation, Depletion And Amortization	$3.900M	$4.100M	$17.30M
YoY Change	-4.88%	-8.89%	-5.46%
Cash From Operating Activities	$35.50M	$29.00M	$177.7M
YoY Change	22.41%	-730.43%	141.43%
INVESTING ACTIVITIES
Capital Expenditures	-$1.900M	-$1.600M	$13.87M
YoY Change	18.75%	14.29%	-139.62%
Acquisitions
YoY Change
Other Investing Activities	-$272.1M	-$232.4M	$165.8M
YoY Change	17.08%	-241.11%	-27.06%
Cash From Investing Activities	-$274.0M	-$234.0M	$152.0M
YoY Change	17.09%	-243.29%	-20.98%
FINANCING ACTIVITIES
Cash Dividend Paid			$29.85M
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	240.4M	223.1M	-365.6M
YoY Change	7.75%	-285.61%	22.19%
NET CHANGE
Cash From Operating Activities	35.50M	29.00M	177.7M
Cash From Investing Activities	-274.0M	-234.0M	152.0M
Cash From Financing Activities	240.4M	223.1M	-365.6M
Net Change In Cash	1.900M	18.10M	-35.95M
YoY Change	-89.5%	-52.99%	7.95%
FREE CASH FLOW
Cash From Operating Activities	$35.50M	$29.00M	$177.7M
Capital Expenditures	-$1.900M	-$1.600M	$13.87M
Free Cash Flow	$37.40M	$30.60M	$163.8M
YoY Change	22.22%	-1056.25%	50.86%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	56997694	shares
CY2011Q2	pb	Book Value Of Sale Of Non Agency Collateralized Mortgage Obligations BookValueOfSaleOfNonAgencyCollateralizedMortgageObligations	3200000
CY2011Q2	pb	Number Of Non Agency Collateralized Mortgage Obligations NumberOfNonAgencyCollateralizedMortgageObligations	2	Investment
CY2012Q2	dei	Entity Public Float EntityPublicFloat	1830000000
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	536806000
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	178507000
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Other Assets BusinessAcquisitionPurchasePriceAllocationOtherAssets	83803000
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable BusinessAcquisitionCostOfAcquiredEntityEquityInterestsIssuedAndIssuable	358299000
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	3105283000
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	262687000
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	2842596000
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Other Liabilities BusinessAcquisitionPurchasePriceAllocationOtherLiabilities	28252000
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	301530000
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	274119000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Investment Securities Available For Sale BusinessAcquisitionPurchasePriceAllocationInvestmentSecuritiesAvailableForSale	524959000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Furniture Fixtures And Equipment BusinessAcquisitionPurchasePriceAllocationFurnitureFixturesAndEquipment	36502000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Loans Held For Investment BusinessAcquisitionPurchasePriceAllocationLoansHeldForInvestment	1133867000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Loans Held For Sale BusinessAcquisitionPurchasePriceAllocationLoansHeldForSale	13770000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Other Borrowings BusinessAcquisitionPurchasePriceAllocationOtherBorrowings	318692000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Core Deposit Intangible BusinessAcquisitionPurchasePriceAllocationCoreDepositIntangible	12392000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Deposits BusinessAcquisitionPurchasePriceAllocationDeposits	2495652000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Other Real Estate Owned BusinessAcquisitionPurchasePriceAllocationOtherRealEstateOwned	1232000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Non Current Assets Federal Home Loan Bank Stock BusinessAcquisitionPurchasePriceAllocationNonCurrentAssetsFederalHomeLoanBankStock	2355000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Cash And Due From Banks BusinessAcquisitionPurchasePriceAllocationCashAndDueFromBanks	98720000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Federal Funds Sold BusinessAcquisitionPurchasePriceAllocationFederalFundsSold	202810000
CY2012Q3	pb	Business Acquisition Purchase Price Allocation Investment Securities Held To Maturity BusinessAcquisitionPurchasePriceAllocationInvestmentSecuritiesHeldToMaturity	994873000
CY2012Q3	pb	Business Acquisitions Equity Interests Issued Or Issuable Number Of Shares Issued BusinessAcquisitionsEquityInterestsIssuedOrIssuableNumberOfSharesIssued	8524835000	shares
CY2008Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	14368000
CY2008Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	7594000
CY2008Q4	us-gaap	Other Real Estate OtherRealEstate	4450000
CY2008Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	2142000
CY2008Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	9736000
CY2008Q4	us-gaap	Foreclosed Assets ForeclosedAssets	182000
CY2008Q4	pb	Percentage Of Non Performing Assets To Loans And Other Real Estate PercentageOfNonPerformingAssetsToLoansAndOtherRealEstate	0.0040	pure
CY2009Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	51863000
CY2009Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	16356000
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	195317000
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	25.88
CY2009Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	2332000
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	856000	shares
CY2009Q4	us-gaap	Other Real Estate OtherRealEstate	7829000
CY2009Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	6079000
CY2009Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	8411000
CY2009Q4	us-gaap	Foreclosed Assets ForeclosedAssets	116000
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	1351245000
CY2009Q4	pb	Percentage Of Non Performing Assets To Loans And Other Real Estate PercentageOfNonPerformingAssetsToLoansAndOtherRealEstate	0.0048	pure
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	8374000
CY2010Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	51584000
CY2010Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	15842000
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	159368000
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	27.24
CY2010Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	189000
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	696000	shares
CY2010Q4	us-gaap	Other Real Estate OtherRealEstate	11053000
CY2010Q4	us-gaap	Goodwill Goodwill	924258000
CY2010Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	4439000
CY2010Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	4628000
CY2010Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	12783000
CY2010Q4	us-gaap	Foreclosed Assets ForeclosedAssets	161000
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	1452339000
CY2010Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	28776000
CY2010Q4	pb	Percentage Of Non Performing Assets To Loans And Other Real Estate PercentageOfNonPerformingAssetsToLoansAndOtherRealEstate	0.0045	pure
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	6391000
CY2011Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4006000
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CY2011Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	50408000
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CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	37088	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	285318000
CY2011Q4	us-gaap	Loans And Leases Receivable Other LoansAndLeasesReceivableOther	33421000
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CY2011Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	51594000
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
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CY2011Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1972226000
CY2011Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	11601000
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CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	378000
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CY2011Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	7254000
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CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	159656000
CY2011Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3578000
CY2011Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	212800000
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CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	46910327	shares
CY2011Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	3578000
CY2011Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	3765906000
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLosses	523000
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	51600000
CY2011Q4	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment1 FinancingReceivableModificationsPreModificationRecordedInvestment1	5487000
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	883575000
CY2011Q4	us-gaap	Foreclosed Assets ForeclosedAssets	146000
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	672000
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	1567265000
CY2011Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	20996000
CY2011Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	2700000
CY2011Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	1186000
CY2011Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	213442000
CY2011Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	15168000
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	301000
CY2011Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	4801000
CY2011Q4	pb	Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue	10436000
CY2011Q4	pb	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentTax	7254000
CY2011Q4	pb	Loans Held For Investment LoansHeldForInvestment	3765906000
CY2011Q4	pb	Fair Value Of Remaining Non Agency Collateralized Mortgage Obligations FairValueOfRemainingNonAgencyCollateralizedMortgageObligations	2500000
CY2011Q4	pb	Good Will Amortization Expense GoodWillAmortizationExpense
CY2011Q4	pb	Deferred Tax Assets Restricted Stock DeferredTaxAssetsRestrictedStock	2309000
CY2011Q4	pb	Deferred Tax Assets Tax Deferred Expense Other Real Estate Properties Write Downs DeferredTaxAssetsTaxDeferredExpenseOtherRealEstatePropertiesWriteDowns	525000
CY2011Q4	pb	Deferred Tax Assets Tax Deferred Expense Securities DeferredTaxAssetsTaxDeferredExpenseSecurities	512000
CY2011Q4	pb	Deferred Tax Liabilities Investments In Partnerships DeferredTaxLiabilitiesInvestmentsInPartnerships	9233000
CY2011Q4	pb	Deferred Tax Liabilities Loans DeferredTaxLiabilitiesLoans	38000
CY2011Q4	pb	Book Value Of Remaining Non Agency Collateralized Mortgage Obligations BookValueOfRemainingNonAgencyCollateralizedMortgageObligations	2500000
CY2011Q4	pb	Percentage Of Loans Related To Single Industry On Loans PercentageOfLoansRelatedToSingleIndustryOnLoans	0.10	pure
CY2011Q4	pb	Percentage Of Non Performing Assets To Loans And Other Real Estate PercentageOfNonPerformingAssetsToLoansAndOtherRealEstate	0.0032	pure
CY2011Q4	pb	Average Rate Paid On Securities Sold Under Repurchase AverageRatePaidOnSecuritiesSoldUnderRepurchase	0.0054	pure
CY2011Q4	pb	Number Of Non Agency Collateralized Mortgage Obligations NumberOfNonAgencyCollateralizedMortgageObligations	8	Investment
CY2011Q4	pb	Share Based Compensation Arrangement By Share Based Payment Award Options Contractual Term ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsContractualTerm	10	Y
CY2011Q4	pb	Financing Receivable Recorded Investment FinancingReceivableRecordedInvestment	3765906000
CY2011Q4	pb	Financing Receivable Recorded Investment Past Due And Non Accrual Loans FinancingReceivableRecordedInvestmentPastDueAndNonAccrualLoans	3578000
CY2011Q4	pb	Allowance For Credit Losses As Percentage Of Loans AllowanceForCreditLossesAsPercentageOfLoans	0.0137	pure
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	5247000
CY2012Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	6851000
CY2012Q4	us-gaap	Contractual Obligation Due In Fourth And Fifth Year ContractualObligationDueInFourthAndFifthYear	65918000
CY2012Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate Range From FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRateRangeFrom	0.0408	pure
CY2012Q4	us-gaap	Other Assets OtherAssets	46099000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	27.42
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	25262000
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	20000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	39000
CY2012Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	941000
CY2012Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	50583000
CY2012Q4	us-gaap	Other Borrowings OtherBorrowings	256753000
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	37088	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1121102000
CY2012Q4	us-gaap	Loans And Leases Receivable Other LoansAndLeasesReceivableOther	35488000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	2942000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	157576000
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	226670000
CY2012Q4	us-gaap	Allowance For Notes And Loans Receivable Current AllowanceForNotesAndLoansReceivableCurrent	5152885000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	1250000	shares
CY2012Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	52564000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	124429000
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2012Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	13015000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	7602000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	380000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	375000	shares
CY2012Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7418695000
CY2012Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	3016205000
CY2012Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	34461000
CY2012Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7215395000
CY2012Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	8625639000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2083000
CY2012Q4	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	771114000
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	56797000
CY2012Q4	us-gaap	Loans Receivable With Variable Rates Of Interest LoansReceivableWithVariableRatesOfInterest	2438286000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	169317000
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	750236000
CY2012Q4	us-gaap	Assets Assets	14583573000
CY2012Q4	us-gaap	Deposits Deposits	11641844000
CY2012Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1981000
CY2012Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	186720000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	4567000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	5242000
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	326304000
CY2012Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	33056000
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	10610000
CY2012Q4	us-gaap	Contractual Obligation ContractualObligation	971323000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	6802424000
CY2012Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	42337000
CY2012Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	156140000
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	6018000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	1043000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	5566000
CY2012Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	1260443000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	21673000
CY2012Q4	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	10433000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	774000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	28.39
CY2012Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More After12 Months ContractualMaturitiesTimeDeposits100000OrMoreAfter12Months	77877000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	331000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	7988000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	4830000
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer LoansAndLeasesReceivableConsumer	103725000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	3094000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	39000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	386000	shares
CY2012Q4	us-gaap	Contractual Obligation Due After Fifth Year ContractualObligationDueAfterFifthYear	268580000
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	8986000
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	260224000
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	62815000
CY2012Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	5127376000
CY2012Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	454502000
CY2012Q4	us-gaap	Longterm Federal Home Loan Bank Advances Noncurrent LongtermFederalHomeLoanBankAdvancesNoncurrent	11753000
CY2012Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate Range To FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRateRangeTo	0.0610	pure
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1887000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	6141000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	3153000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	6996367000
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	14583573000
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	56484234	shares
CY2012Q4	us-gaap	Loans Receivable With Fixed Rates Of Interest LoansReceivableWithFixedRatesOfInterest	2811163000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	1300000000
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	56484000
CY2012Q4	us-gaap	Contractual Obligation Due In Next Twelve Months ContractualObligationDueInNextTwelveMonths	508788000
CY2012Q4	us-gaap	Land Land	66694000
CY2012Q4	us-gaap	Other Real Estate OtherRealEstate	7234000
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount	7215395000
CY2012Q4	us-gaap	Goodwill Goodwill	1217162000
CY2012Q4	us-gaap	Federal Funds Sold FederalFundsSold	352000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	326000	shares
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1904000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2508000
CY2012Q4	us-gaap	Liabilities Liabilities	12494184000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	8875000
CY2012Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	672438000
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	54126000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3756000
CY2012Q4	us-gaap	Loans Receivable Net LoansReceivableNet	5249449000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2
CY2012Q4	us-gaap	Junior Subordinated Notes JuniorSubordinatedNotes	85055000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	4791000
CY2012Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	7018000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	3763000
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	211000
CY2012Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	7459000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	28635000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	331000
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	106224000
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	607000
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	1122476000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	18239000
CY2012Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	245000000
CY2012Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	652000
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2012Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	20559000
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	4901000
CY2012Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Weighted Average Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankWeightedAverageInterestRate	0.0017	pure
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1505000
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	1374000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	24110000
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	205268000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	111688000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	28412000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	5382000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	4784000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	9306000
CY2012Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	325952000
CY2012Q4	us-gaap	Borrowed Funds BorrowedFunds	711255000
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	56447146	shares
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	5160000
CY2012Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	5713000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	181020000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	123508000
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	853400000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	212846000
CY2012Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	5179940000
CY2012Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLosses	4921000
CY2012Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	10400000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	13714000
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	52600000
CY2012Q4	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment1 FinancingReceivableModificationsPreModificationRecordedInvestment1	1123000
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1274290000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	4189000
CY2012Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	4334000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	154827000
CY2012Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	109108000
CY2012Q4	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment1 FinancingReceivableModificationsPostModificationRecordedInvestment1	1065000
CY2012Q4	us-gaap	Held To Maturity Securities Debt Maturities Fair Value HeldToMaturitySecuritiesDebtMaturitiesFairValue	7418695000
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2012Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	6682000
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	54956000
CY2012Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	323408000
CY2012Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	4838000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	28.02
CY2012Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0522	pure
CY2012Q4	us-gaap	Contractual Obligation Due In Second And Third Year ContractualObligationDueInSecondAndThirdYear	128037000
CY2012Q4	us-gaap	Foreclosed Assets ForeclosedAssets	68000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	224000
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	2089389000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	26159000
CY2012Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	2200000
CY2012Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	1981000
CY2012Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	326304000
CY2012Q4	us-gaap	Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	330	Securities
CY2012Q4	pb	Fair Value Disclosure Off Balance Sheet Risks Commitments To Extend Credit FairValueDisclosureOffBalanceSheetRisksCommitmentsToExtendCredit	130900000
CY2012Q4	pb	Funds Outstanding Under Agreement FundsOutstandingUnderAgreement	256800000
CY2012Q4	pb	Good Will Amortization Expense GoodWillAmortizationExpense
CY2012Q4	pb	Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue	21342000
CY2012Q4	pb	Deferred Tax Assets Restricted Stock DeferredTaxAssetsRestrictedStock	3192000
CY2012Q4	pb	Number Of Stock Based Employee Compensation Plans Expired NumberOfStockBasedEmployeeCompensationPlansExpired	2	OptionPlan
CY2012Q4	pb	Minimum Percentage Likelihood Of Tax Benefit To Be Realized Upon Final Settlement MinimumPercentageLikelihoodOfTaxBenefitToBeRealizedUponFinalSettlement	0.50	pure
CY2012Q4	pb	Purchased Credit Impaired Loans Outstanding Principal Balance PurchasedCreditImpairedLoansOutstandingPrincipalBalance	46914000
CY2012Q4	pb	Financing Receivable Recorded Investment FinancingReceivableRecordedInvestment	5179940000
CY2012Q4	pb	Funds Available On Other Borrowings And Securities FundsAvailableOnOtherBorrowingsAndSecurities	3710000000
CY2012Q4	pb	Share Based Compensation Arrangement Unrecognized Compensation Expense ShareBasedCompensationArrangementUnrecognizedCompensationExpense	8100000
CY2012Q4	pb	Number Of Stock Based Employee Compensation Plans NumberOfStockBasedEmployeeCompensationPlans	4	OptionPlan
CY2012Q4	pb	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentTax	4839000
CY2012Q4	pb	Loans Held For Investment LoansHeldForInvestment	5169507000
CY2012Q4	pb	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableAggregateIntrinsicValue	4751000
CY2012Q4	pb	Number Of Non Performing Assets NumberOfNonPerformingAssets	116	Assets
CY2012Q4	pb	Outstanding Troubled Debt Restructurings OutstandingTroubledDebtRestructurings	1100000
CY2012Q4	pb	Deferred Tax Assets Tax Deferred Expense Other Real Estate Properties Write Downs DeferredTaxAssetsTaxDeferredExpenseOtherRealEstatePropertiesWriteDowns	967000
CY2012Q4	pb	Deferred Tax Liabilities Investments In Partnerships DeferredTaxLiabilitiesInvestmentsInPartnerships	9296000
CY2012Q4	pb	Business Acquisition Purchase Price Allocation Deposit BusinessAcquisitionPurchasePriceAllocationDeposit	1200000000
CY2012Q4	pb	Available For Sale Debt Maturities Net Carrying Amount AvailableForSaleDebtMaturitiesNetCarryingAmount	45650000
CY2012Q4	pb	Percentage Of Loans Related To Single Industry On Loans PercentageOfLoansRelatedToSingleIndustryOnLoans	0.10	pure
CY2012Q4	pb	Percentage Of Non Performing Assets To Loans And Other Real Estate PercentageOfNonPerformingAssetsToLoansAndOtherRealEstate	0.0025	pure
CY2012Q4	pb	Average Rate Paid On Securities Sold Under Repurchase AverageRatePaidOnSecuritiesSoldUnderRepurchase	0.0027	pure
CY2012Q4	pb	Maximum Percentage Of Principal And Interest Collectible Substandard Impaired Loans MaximumPercentageOfPrincipalAndInterestCollectibleSubstandardImpairedLoans	1.00	pure
CY2012Q4	pb	Minimum Period For Ceases Accruing Interest MinimumPeriodForCeasesAccruingInterest	90	D
CY2012Q4	pb	Number Of Stock Option Plans NumberOfStockOptionPlans	1	OptionPlan
CY2012Q4	pb	Deferred Tax Liabilities Securities DeferredTaxLiabilitiesSecurities	9901000
CY2012Q4	pb	Business Combination Goodwill Recognized Segment Allocation Amount BusinessCombinationGoodwillRecognizedSegmentAllocationAmount	274100000
CY2012Q4	pb	Amount Of Repurchase Agreement AmountOfRepurchaseAgreement	23.5
CY2012Q4	pb	Held To Maturity Securities Debt Maturities Amortized Cost HeldToMaturitySecuritiesDebtMaturitiesAmortizedCost	412971000
CY2012Q4	pb	Financing Receivable Recorded Investment Past Due And Non Accrual Loans FinancingReceivableRecordedInvestmentPastDueAndNonAccrualLoans	5382000
CY2012Q4	pb	Purchased Credit Impaired Loans Carrying Amount PurchasedCreditImpairedLoansCarryingAmount	22880000
CY2012Q4	pb	Financing Receivable Purchase Credit Impaired Loans FinancingReceivablePurchaseCreditImpairedLoans	22880000
CY2012Q4	pb	Deferred Tax Assets Loan Purchase Discounts DeferredTaxAssetsLoanPurchaseDiscounts	28557000
CY2012Q4	pb	Allowance For Credit Losses As Percentage Of Loans AllowanceForCreditLossesAsPercentageOfLoans	0.0101	pure
CY2012Q4	pb	Available For Sale Securities Debt Maturities Amortized Cost Aggregate AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAggregate	43529000
CY2012Q4	pb	Held To Maturity Securities Debt Maturities Fair Value Aggregate HeldToMaturitySecuritiesDebtMaturitiesFairValueAggregate	422328000
CY2012Q4	pb	Number Of Full Service Banking Locations NumberOfFullServiceBankingLocations	213	Branches
CY2012Q4	pb	Loans Receivable Gross Of Acquired Loan Discount Fair Value Disclosure LoansReceivableGrossOfAcquiredLoanDiscountFairValueDisclosure	5249449000
CY2010	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-13585000
CY2010	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	3250000
CY2010	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	141000	shares
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2502000
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.74
CY2010	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	3583000
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	191802000
CY2010	us-gaap	Net Change Noninterest Bearing Deposits Domestic NetChangeNoninterestBearingDepositsDomestic	52066000
CY2010	us-gaap	Interest Paid InterestPaid	69718000
CY2010	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	379771000
CY2010	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1938000
CY2010	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2696000
CY2010	us-gaap	Interest Expense Deposits InterestExpenseDeposits	61509000
CY2010	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1346000
CY2010	us-gaap	Profit Loss ProfitLoss	127708000
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	151952000
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	64477000
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	19.16
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross		shares
CY2010	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	1285000
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46621000	shares
CY2010	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-15744000
CY2010	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	1940137000
CY2010	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	209711000
CY2010	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	3860000
CY2010	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	13585000
CY2010	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	1035000
CY2010	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	35353000
CY2010	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	701000
CY2010	us-gaap	Other Noninterest Expense OtherNoninterestExpense	29871000
CY2010	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	595000
CY2010	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	29845000
CY2010	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	384537000
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	3037000
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2010	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8313000
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-35949000
CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1246820000
CY2010	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1619000
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3848000
CY2010	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	5300000
CY2010	us-gaap	Cash Dividends Paid To Parent Company CashDividendsPaidToParentCompany	27400000
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	964000
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3037000
CY2010	us-gaap	Fees And Commissions FeesAndCommissions	10089000
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	25.68
CY2010	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	-723063000
CY2010	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1658000
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y5M23D
CY2010	us-gaap	Communication Communication	7781000
CY2010	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2502000
CY2010	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	17329000
CY2010	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	360000000
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	539000
CY2010	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	29160000
CY2010	us-gaap	Net Income Loss NetIncomeLoss	127708000
CY2010	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	256000
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions	0
CY2010	us-gaap	Noninterest Income NoninterestIncome	53833000
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.73
CY2010	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-8515000
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46832000	shares
CY2010	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	22181000
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-365597000
CY2010	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	211000	shares
CY2010	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	2166000
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	125206000
CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1168459000
CY2010	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	11707000
CY2010	us-gaap	Noninterest Income Other NoninterestIncomeOther	2129000
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	63555000
CY2010	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	304563000
CY2010	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	318148000
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	64094000
CY2010	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	174707000
CY2010	us-gaap	Payments Of Dividends PaymentsOfDividends	29845000
CY2010	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-3848000
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13866000
CY2010	us-gaap	Noninterest Expense NoninterestExpense	166594000
CY2010	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	44751000
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9016000
CY2010	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	119000
CY2010	us-gaap	Occupancy Net OccupancyNet	15153000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	19000	shares
CY2010	us-gaap	Professional Fees ProfessionalFees	3099000
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	999998000
CY2010	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.64
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3000000
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2010	us-gaap	Labor And Related Expense LaborAndRelatedExpense	86980000
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	3.63
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46846000	shares
CY2011	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-5776000
CY2011	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	1478721000
CY2011	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	214273000
CY2010	us-gaap	Interest Expense InterestExpense	66389000
CY2010	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	674000
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	67131000
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	539000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	177696000
CY2010	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	15483000
CY2010	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	19500000
CY2010	pb	Debt Instrument Call Date Period DebtInstrumentCallDatePeriod	5	Y
CY2010	pb	Print And Supply Expense PrintAndSupplyExpense	1951000
CY2010	pb	Premium Paid PremiumPaid	26876000
CY2010	pb	Regulatory Assessments And Fdic Insurance RegulatoryAssessmentsAndFdicInsurance	11039000
CY2010	pb	Travel And Development Expense TravelAndDevelopmentExpense	1691000
CY2010	pb	Stock Options Exercised And Vesting Of Restricted Stock Awards Net Of Restricted Stock Cancellations And Forfeitures StockOptionsExercisedAndVestingOfRestrictedStockAwardsNetOfRestrictedStockCancellationsAndForfeitures	2696000
CY2010	pb	Income Tax Reconciliation Bank Owned Life Insurance Income IncomeTaxReconciliationBankOwnedLifeInsuranceIncome	580000
CY2010	pb	Income Tax Reconciliation Qualified School Construction Bond Credit IncomeTaxReconciliationQualifiedSchoolConstructionBondCredit	501000
CY2010	pb	Income Tax Reconciliation Qualified Stock Options IncomeTaxReconciliationQualifiedStockOptions	99000
CY2010	pb	Income Tax Reconciliation Qualified Zone Academy Bond Credit IncomeTaxReconciliationQualifiedZoneAcademyBondCredit	373000
CY2010	pb	Financing Receivable Allowance For Credit Losses Charge Offs Net FinancingReceivableAllowanceForCreditLossesChargeOffsNet	13864000
CY2010	pb	Non Sufficient Funds Fees NonSufficientFundsFees	27580000
CY2010	pb	Other Real Estate Expense OtherRealEstateExpense	3483000
CY2010	pb	Other Noninterest Expense And Regulatory Assessments And Fdic Insurance OtherNoninterestExpenseAndRegulatoryAssessmentsAndFdicInsurance	29871000
CY2010	pb	Other Non Interest Expense Other OtherNonInterestExpenseOther	7919000
CY2010	pb	Matching Contribution Amounts MatchingContributionAmounts	2000000
CY2010	pb	Loss Gain On Sale Or Write Down Of Premises Equipment And Other Real Estate LossGainOnSaleOrWriteDownOfPremisesEquipmentAndOtherRealEstate	3860000
CY2010	pb	Debit Card And Atm Card Income DebitCardAndAtmCardIncome	12581000
CY2010	pb	Debit Card Data Processing And Software Amortization DebitCardDataProcessingAndSoftwareAmortization	6222000
CY2010	pb	Brokered Mortgage Income BrokeredMortgageIncome	205000
CY2010	pb	Other Non Interest Expense Property Taxes OtherNonInterestExpensePropertyTaxes	3947000
CY2010	pb	Net Accretion Of Discount On Deposits NetAccretionOfDiscountOnDeposits	1354000
CY2011	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	2984000
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	171000	shares
CY2011	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2344000
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4175000
CY2011	us-gaap	Interest Expense Deposits InterestExpenseDeposits	40975000
CY2011	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-448000
CY2011	us-gaap	Profit Loss ProfitLoss	141749000
CY2011	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3484000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-365300000
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	70324000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	24.48
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross		shares
CY2011	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	1424000
CY2011	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	7210000
CY2011	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	33742000
CY2011	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	371908000
CY2011	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1382000
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-832000
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.03
CY2011	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6810000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	213766000
CY2011	us-gaap	Net Change Noninterest Bearing Deposits Domestic NetChangeNoninterestBearingDepositsDomestic	299036000
CY2011	us-gaap	Interest Paid InterestPaid	46451000
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	3576000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2011	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	454408000
CY2011	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8150000
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	54074000
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1301230000
CY2011	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1660000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1280000
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	5200000
CY2011	us-gaap	Cash Dividends Paid To Parent Company CashDividendsPaidToParentCompany	35800000
CY2011	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	200964000
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1200000
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3576000
CY2011	us-gaap	Fees And Commissions FeesAndCommissions	9981000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
CY2011	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	306665000
CY2011	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	527000
CY2011	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	5200000
CY2011	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	912000
CY2011	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	14202000
CY2011	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	253000
CY2011	us-gaap	Other Noninterest Expense OtherNoninterestExpense	25400000
CY2011	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	369000
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y10M17D
CY2011	us-gaap	Communication Communication	6946000
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	832000
CY2011	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	15930000
CY2011	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	-360000000
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2006000
CY2011	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	298246000
CY2011	us-gaap	Net Income Loss NetIncomeLoss	141749000
CY2011	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	849000
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions	0
CY2011	us-gaap	Noninterest Income NoninterestIncome	56043000
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.01
CY2011	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-1310000
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47017000	shares
CY2011	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	28675000
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	201505000
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	171000	shares
CY2011	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	581000
CY2011	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	2184000
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	140917000
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1255715000
CY2011	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1643000
CY2011	us-gaap	Noninterest Income Other NoninterestIncomeOther	2136000
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	70011000
CY2011	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	4168000
CY2011	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	321468000
CY2011	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	326668000
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	72017000
CY2011	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	157580000
CY2011	us-gaap	Payments Of Dividends PaymentsOfDividends	33742000
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-1280000
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9480000
CY2011	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	7142000
CY2011	us-gaap	Noninterest Expense NoninterestExpense	163745000
CY2011	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	14051000
CY2011	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	581000
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7780000
CY2011	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	55000
CY2011	us-gaap	Occupancy Net OccupancyNet	14634000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod		shares
CY2011	us-gaap	Professional Fees ProfessionalFees	2598000
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1150000000
CY2011	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.72
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3600000
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2011	us-gaap	Labor And Related Expense LaborAndRelatedExpense	92057000
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	3.62
CY2011	us-gaap	Interest Expense InterestExpense	45240000
CY2011	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	-20967000
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	74818000
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2006000
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	217869000
CY2011	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6850000
CY2011	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	11600000
CY2011	pb	Troubled Debt Restructurings Number Of Contracts TroubledDebtRestructuringsNumberOfContracts	9000	TDRs
CY2011	pb	Print And Supply Expense PrintAndSupplyExpense	1807000
CY2011	pb	Regulatory Assessments And Fdic Insurance RegulatoryAssessmentsAndFdicInsurance	8901000
CY2011	pb	Travel And Development Expense TravelAndDevelopmentExpense	1539000
CY2011	pb	Stock Options Exercised And Vesting Of Restricted Stock Awards Net Of Restricted Stock Cancellations And Forfeitures StockOptionsExercisedAndVestingOfRestrictedStockAwardsNetOfRestrictedStockCancellationsAndForfeitures	4175000
CY2011	pb	Income Tax Reconciliation Bank Owned Life Insurance Income IncomeTaxReconciliationBankOwnedLifeInsuranceIncome	484000
CY2011	pb	Income Tax Reconciliation Qualified School Construction Bond Credit IncomeTaxReconciliationQualifiedSchoolConstructionBondCredit	504000
CY2011	pb	Income Tax Reconciliation Qualified Stock Options IncomeTaxReconciliationQualifiedStockOptions	55000
CY2011	pb	Income Tax Reconciliation Qualified Zone Academy Bond Credit IncomeTaxReconciliationQualifiedZoneAcademyBondCredit	373000
CY2011	pb	Financing Receivable Allowance For Credit Losses Charge Offs Net FinancingReceivableAllowanceForCreditLossesChargeOffsNet	5190000
CY2011	pb	Non Sufficient Funds Fees NonSufficientFundsFees	24442000
CY2011	pb	Other Real Estate Expense OtherRealEstateExpense	1501000
CY2011	pb	Other Noninterest Expense And Regulatory Assessments And Fdic Insurance OtherNoninterestExpenseAndRegulatoryAssessmentsAndFdicInsurance	25400000
CY2011	pb	Other Non Interest Expense Other OtherNonInterestExpenseOther	7186000
CY2011	pb	Matching Contribution Amounts MatchingContributionAmounts	1800000
CY2011	pb	Loss Gain On Sale Or Write Down Of Premises Equipment And Other Real Estate LossGainOnSaleOrWriteDownOfPremisesEquipmentAndOtherRealEstate	528000
CY2011	pb	Debit Card And Atm Card Income DebitCardAndAtmCardIncome	15391000
CY2011	pb	Debit Card Data Processing And Software Amortization DebitCardDataProcessingAndSoftwareAmortization	6823000
CY2011	pb	Brokered Mortgage Income BrokeredMortgageIncome	211000
CY2011	pb	Aggregate Book Value Percentage Of Securities To Shareholders Equity AggregateBookValuePercentageOfSecuritiesToShareholdersEquity	0.10	pure
CY2011	pb	Other Non Interest Expense Property Taxes OtherNonInterestExpensePropertyTaxes	3823000
CY2011	pb	Net Accretion Of Discount On Deposits NetAccretionOfDiscountOnDeposits	33000
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001068851
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Trading Symbol TradingSymbol	PB
CY2012	dei	Entity Registrant Name EntityRegistrantName	PROSPERITY BANCSHARES INC
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P3Y2M1D
CY2012	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	2593000
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	131000	shares
CY2012	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2673000
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4486000
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.24
CY2012	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3836000
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3573000
CY2012	us-gaap	Interest Expense Deposits InterestExpenseDeposits	34486000
CY2012	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-2417000
CY2012	us-gaap	Profit Loss ProfitLoss	167901000
CY2012	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	6281000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1201735000
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	75743000
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	27.36
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross		shares
CY2012	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	1418000
CY2012	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	1667000
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51794000	shares
CY2012	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	80927000
CY2012	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	3659045000
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y4M24D
CY2012	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	271324000
CY2012	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	3.81
CY2012	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	231000
CY2012	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6100000
CY2012	us-gaap	Interest Expense Other Short Term Borrowings InterestExpenseOtherShortTermBorrowings	1352000
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	16855000
CY2012	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	270000
CY2012	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8923000
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	112862000
CY2012	us-gaap	Other Noninterest Expense OtherNoninterestExpense	33201000
CY2012	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	705000
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	41543000
CY2012	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	419842000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	251684000
CY2012	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	2800000
CY2012	us-gaap	Net Change Noninterest Bearing Deposits Domestic NetChangeNoninterestBearingDepositsDomestic	336997000
CY2012	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	8336000
CY2012	us-gaap	Interest Paid InterestPaid	40034000
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	3607000
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2012	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	447471000
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1796741000
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2766000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-6903000
CY2012	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	88461000
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	5400000
CY2012	us-gaap	Cash Dividends Paid To Parent Company CashDividendsPaidToParentCompany	228500000
CY2012	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	213830000
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1200000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3607000
CY2012	us-gaap	Fees And Commissions FeesAndCommissions	11112000
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	30.93
CY2012	us-gaap	Net Change Interest Bearing Deposits Domestic NetChangeInterestBearingDepositsDomestic	480866000
CY2012	us-gaap	Communication Communication	8158000
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	4486000
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div> <p style="PADDING-BOTTOM: 0px; MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2"><b>Nature of Operations</b>—Prosperity Bancshares, Inc.<font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">®</sup></font> (“Bancshares”) and its subsidiaries, Prosperity Holdings of Delaware, LLC (“Holdings”) and Prosperity Bank<font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">®</sup></font> (the “Bank”, and together with Bancshares and Holdings, collectively referred to as the “Company”) provide retail and commercial banking services. The Company operates its business as one domestic segment.</font></p> <p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">The Bank operated two hundred thirteen (213) full-service banking locations; with fifty-nine (59) in the Houston area, twenty (20) in the South Texas area including Corpus Christi and Victoria, thirty-four (34) in the Central Texas area, ten (10) in the Bryan/College Station area, twenty-one (21) in East Texas, thirty-four (34) in the West Texas area including Lubbock, Midland-Odessa, and Abilene, and thirty-five (35) in the Dallas/Fort Worth, Texas area.</font></p> </div>
CY2012	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	14253000
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y2M12D
CY2012	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	16152000
CY2012	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	245000000
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9615000
CY2012	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	148083000
CY2012	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	12000000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	167901000
CY2012	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	410000
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions	0
CY2012	us-gaap	Noninterest Income NoninterestIncome	75535000
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.23
CY2012	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	138000
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51941000	shares
CY2012	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	541000
CY2012	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	66893000
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1104783000
CY2012	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	91798000
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	147000	shares
CY2012	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	2650000
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	163415000
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1724322000
CY2012	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1037000
CY2012	us-gaap	Noninterest Income Other NoninterestIncomeOther	3067000
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	74168000
CY2012	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	967000
CY2012	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	374606000
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	380706000
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1109999000
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	83783000
CY2012	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	148374000
CY2012	us-gaap	Payments Of Dividends PaymentsOfDividends	41543000
CY2012	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-6903000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	769000
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12441000
CY2012	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	4094000
CY2012	us-gaap	Noninterest Expense NoninterestExpense	198457000
CY2012	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	12049000
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7229000
CY2012	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	144000
CY2012	us-gaap	Occupancy Net OccupancyNet	16475000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	8000	shares
CY2012	us-gaap	Professional Fees ProfessionalFees	4118000
CY2012	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.80
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3600000
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2012	us-gaap	Labor And Related Expense LaborAndRelatedExpense	115505000
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div> <p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2"><b>Use of Estimates</b>—The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include, but are not limited to certain fair value measures including the calculation of stock-based compensation, the valuation of goodwill and available for sale securities and the calculation of allowance for credit losses. Actual results could differ from these estimates.</font></p> </div>
CY2012	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	3.80
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	9615000
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	209814000
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	7896000
CY2012	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	10433000
CY2012	us-gaap	Interest Expense InterestExpense	39136000
CY2012	us-gaap	Merger And Acquisition Costs MergerAndAcquisitionCosts	7020000
CY2012	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	38095000
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	88089000
CY2012	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	8900000
CY2012	pb	Share Based Compensation Arrangement Unrecognized Compensation Expense Expected Term ShareBasedCompensationArrangementUnrecognizedCompensationExpenseExpectedTerm	1.8
CY2012	pb	Debenture Interest Payment To Be Deferred Maximum Period DebentureInterestPaymentToBeDeferredMaximumPeriod	5	Y
CY2012	pb	Troubled Debt Restructurings Number Of Contracts TroubledDebtRestructuringsNumberOfContracts	6000	TDRs
CY2012	pb	Print And Supply Expense PrintAndSupplyExpense	2586000
CY2012	pb	Real Estate Owned Outstanding RealEstateOwnedOutstanding	3900000
CY2012	pb	Regulatory Assessments And Fdic Insurance RegulatoryAssessmentsAndFdicInsurance	7679000
CY2012	pb	Travel And Development Expense TravelAndDevelopmentExpense	2179000
CY2012	pb	Stock Options Exercised And Vesting Of Restricted Stock Awards Net Of Restricted Stock Cancellations And Forfeitures StockOptionsExercisedAndVestingOfRestrictedStockAwardsNetOfRestrictedStockCancellationsAndForfeitures	3573000
CY2012	pb	Impaired Loans Outstanding ImpairedLoansOutstanding	5100000
CY2012	pb	Income Tax Reconciliation Bank Owned Life Insurance Income IncomeTaxReconciliationBankOwnedLifeInsuranceIncome	936000
CY2012	pb	Income Tax Reconciliation Qualified School Construction Bond Credit IncomeTaxReconciliationQualifiedSchoolConstructionBondCredit	504000
CY2012	pb	Income Tax Reconciliation Qualified Stock Options IncomeTaxReconciliationQualifiedStockOptions	22000
CY2012	pb	Financing Receivable Allowance For Credit Losses Charge Offs Net FinancingReceivableAllowanceForCreditLossesChargeOffsNet	5130000
CY2012	pb	Non Sufficient Funds Fees NonSufficientFundsFees	29113000
CY2012	pb	New Troubled Debt Restructurings NewTroubledDebtRestructurings	1100000
CY2012	pb	Other Real Estate Expense OtherRealEstateExpense	1810000
CY2012	pb	Other Noninterest Expense And Regulatory Assessments And Fdic Insurance OtherNoninterestExpenseAndRegulatoryAssessmentsAndFdicInsurance	33201000
CY2012	pb	Other Non Interest Expense Other OtherNonInterestExpenseOther	9727000
CY2012	pb	Matching Contribution Amounts MatchingContributionAmounts	2400000
CY2012	pb	Loss Gain On Sale Or Write Down Of Premises Equipment And Other Real Estate LossGainOnSaleOrWriteDownOfPremisesEquipmentAndOtherRealEstate	688000
CY2012	pb	Common Stock Issued In Connection With Acquisition Of Texas Bankers Incorporated CommonStockIssuedInConnectionWithAcquisitionOfTexasBankersIncorporated	12708000
CY2012	pb	Debit Card And Atm Card Income DebitCardAndAtmCardIncome	21057000
CY2012	pb	Debit Card Data Processing And Software Amortization DebitCardDataProcessingAndSoftwareAmortization	9445000
CY2012	pb	Brokered Mortgage Income BrokeredMortgageIncome	2681000
CY2012	pb	Additions To Impaired Loans AdditionsToImpairedLoans	11500000
CY2012	pb	Percentage Of Other Non Interest Income And Expense Exceeding Net Interest Income And Noninterest Income PercentageOfOtherNonInterestIncomeAndExpenseExceedingNetInterestIncomeAndNoninterestIncome	0.01	pure
CY2012	pb	Aggregate Book Value Percentage Of Securities To Shareholders Equity AggregateBookValuePercentageOfSecuritiesToShareholdersEquity	0.10	pure
CY2012	pb	Company Match To Employee Four Hundred One K Percentage CompanyMatchToEmployeeFourHundredOneKPercentage	0.50	pure
CY2012	pb	Maximum Of Employee Compensation Percentage MaximumOfEmployeeCompensationPercentage	0.15	pure
CY2012	pb	Determined Period Of Default DeterminedPeriodOfDefault	90	D
CY2012	pb	Period Of Fixed Interest PeriodOfFixedInterest	5	Y
CY2012	pb	Other Non Interest Income From Trust OtherNonInterestIncomeFromTrust	1746000
CY2012	pb	Other Non Interest Expense Property Taxes OtherNonInterestExpensePropertyTaxes	4623000
CY2012	pb	Share Based Compensation Arrangement By Share Based Payment Award Nonvested Options Forfeited During Period Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsForfeitedDuringPeriodFairValue	39000
CY2012	pb	Net Accretion Of Discount On Loans NetAccretionOfDiscountOnLoans	26413000
CY2012	pb	Income Tax Reconciliation Nondeductible Expense Merger Costs IncomeTaxReconciliationNondeductibleExpenseMergerCosts	538000
CY2012	pb	Merger Related Expense MergerRelatedExpense	7000000
CY2012	pb	Net Operating Loss Expiration Period End NetOperatingLossExpirationPeriodEnd	2030
CY2012	pb	Net Operating Loss Expiration Period Start NetOperatingLossExpirationPeriodStart	2025
CY2012	pb	Amount Of Discount On Loan Purchase AmountOfDiscountOnLoanPurchase	79900000
CY2012	pb	Net Accretion Of Discount On Deposits NetAccretionOfDiscountOnDeposits	109000

Files In Submission

Name	View Source	Status
0001193125-13-084693-index-headers.html	Edgar Link	pending
0001193125-13-084693-index.html	Edgar Link	pending
0001193125-13-084693.txt	Edgar Link	pending
0001193125-13-084693-xbrl.zip	Edgar Link	pending
d455873d10k.htm	Edgar Link	pending
d455873dex211.htm	Edgar Link	pending
d455873dex231.htm	Edgar Link	pending
d455873dex311.htm	Edgar Link	pending
d455873dex312.htm	Edgar Link	pending
d455873dex321.htm	Edgar Link	pending
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$PB
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2011 Q4 Form 10-K Financial Statement

#000119312513084693 Filed on February 28, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PB PROSPERITY BANCSHARES INC Stock $pb

2011 Q4 Form 10-K Financial Statement

#000119312513084693 Filed on February 28, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PB
PROSPERITY BANCSHARES INC Stock $pb