XML 33 R79.htm IDEA: XBRL DOCUMENT v2.4.1.9
Loans and Leases (Summary Of Activity Related To The FDIC Indemnification Asset) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
FDIC Indemnification Asset [Roll Forward]      
Balance, beginning of period $ 23,174us-gaap_FDICIndemnificationAsset $ 52,798us-gaap_FDICIndemnificationAsset  
Change in FDIC indemnification asset (15,151)us-gaap_FDICIndemnificationAssetPeriodIncreaseDecrease (25,549)us-gaap_FDICIndemnificationAssetPeriodIncreaseDecrease (15,234)us-gaap_FDICIndemnificationAssetPeriodIncreaseDecrease
Transfers to due from FDIC and other (3,606)umpq_TransfersToDueFromFDIC (4,075)umpq_TransfersToDueFromFDIC  
Balance, end of period $ 4,417us-gaap_FDICIndemnificationAsset $ 23,174us-gaap_FDICIndemnificationAsset $ 52,798us-gaap_FDICIndemnificationAsset