v2.4.1.9

Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands | Total | Common Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member] | Preferred Stock [Member]
--- | --- | --- | --- | --- | ---
Balance, value at Dec. 31, 2013 | $ 1,053,249 us-gaap_StockholdersEquity | $ 860,562 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 202,514 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (12,044)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 2,217 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Balance, shares at Dec. 31, 2013 |  | 51,265 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 9 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Net Income | 19,844 us-gaap_NetIncomeLoss |  | 19,844 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Other comprehensive income | 7,001 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  | 7,001 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Issuance of common stock - cashless exercise of warrants, shares |  | 1,140 colb_StockIssuedDuringPeriodSharesCashlessConversionofWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - cashless exercise of warrants, value | 0 colb_StockIssuedDuringPeriodValueCashlessConversionofWarrants | 0 colb_StockIssuedDuringPeriodValueCashlessConversionofWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - stock option and other plans, value | 405 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised | 405 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - stock option and other plans, shares |  | 19 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - restricted stock awards, net of cancelled awards, value | 680 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 680 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - restricted stock awards, net of cancelled awards, shares |  | 197 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Stock Repurchased During Period, Shares |  | (21)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Stock Repurchased and Retired During Period, Value | (522)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | (522)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Dividends, Preferred Stock, Cash | (12)us-gaap_DividendsPreferredStockCash |  |  |  |
Cash dividends paid on common stock | (6,154)us-gaap_DividendsCommonStockCash |  | (6,154)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Balance, value at Mar. 31, 2014 | 1,074,491 us-gaap_StockholdersEquity | 861,125 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 216,192 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (5,043)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 2,217 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Balance, shares at Mar. 31, 2014 |  | 52,600 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 9 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Balance, value at Dec. 31, 2014 | 1,228,175 us-gaap_StockholdersEquity | 985,839 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 234,498 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 5,621 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 2,217 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Balance, shares at Dec. 31, 2014 |  | 57,437 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 9 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Net Income | 24,361 us-gaap_NetIncomeLoss |  | 24,361 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Other comprehensive income | 8,665 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  | 8,665 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Issuance of common stock - stock option and other plans, value | 428 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised | 428 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - stock option and other plans, shares |  | 17 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - restricted stock awards, net of cancelled awards, value | 862 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 862 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock - restricted stock awards, net of cancelled awards, shares |  | 273 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Stock Repurchased During Period, Shares |  | (28)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Stock Repurchased and Retired During Period, Value | (781)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | (781)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Dividends, Preferred Stock, Cash | (31)us-gaap_DividendsPreferredStockCash |  |  |  |
Cash dividends paid on common stock | (17,236)us-gaap_DividendsCommonStockCash |  | (17,236)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Balance, value at Mar. 31, 2015 | $ 1,244,443 us-gaap_StockholdersEquity | $ 986,348 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 241,592 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 14,286 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 2,217 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Balance, shares at Mar. 31, 2015 |  | 57,699 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 9 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember

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