XML 144 R66.htm IDEA: XBRL DOCUMENT v2.4.1.9
Business Combinations (Schedule of Loans Acquired) (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended
Apr. 18, 2014
Jul. 02, 2013
Sterling Financial Corporation [Member]    
Business Acquisition [Line Items]    
Contractually required principal and interest payments $ 604,136us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition
/ us-gaap_BusinessAcquisitionAxis
= umpq_SterlingFinancialCorporationMember
 
Nonaccretable difference (95,614)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference
/ us-gaap_BusinessAcquisitionAxis
= umpq_SterlingFinancialCorporationMember
 
Cash flows expected to be collected 508,522us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition
/ us-gaap_BusinessAcquisitionAxis
= umpq_SterlingFinancialCorporationMember
 
Accretable yield (110,757)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease
/ us-gaap_BusinessAcquisitionAxis
= umpq_SterlingFinancialCorporationMember
 
Balance of performing non-covered loans 397,765us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue
/ us-gaap_BusinessAcquisitionAxis
= umpq_SterlingFinancialCorporationMember
 
Financial Pacific Holding Corp [Member]    
Business Acquisition [Line Items]    
Contractually required principal and interest payments   350,403us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition
/ us-gaap_BusinessAcquisitionAxis
= umpq_FinancialPacificHoldingCorpMember
Purchase adjustment for credit   (20,520)umpq_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodFairValueAdjustment
/ us-gaap_BusinessAcquisitionAxis
= umpq_FinancialPacificHoldingCorpMember
Balance of performing non-covered loans   $ 264,336us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue
/ us-gaap_BusinessAcquisitionAxis
= umpq_FinancialPacificHoldingCorpMember