| Tue, Jun 2, 2009 | | | COLUMBIA BANKING SYSTEM INC Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and E EDGAR Online (Tue, Jun 2)
| | Wed, May 6, 2009 | | | COLUMBIA BANKING SYSTEM INC Files SEC form 10-Q, Quarterly Report EDGAR Online (Wed, May 6)
| | Thu, Apr 23, 2009 | | | COLUMBIA BANKING SYSTEM INC Files SEC form 8-K, Other Events, Financial Statements and Exhibits EDGAR Online (Thu, Apr 23)
| | Fri, Feb 27, 2009 | | | COLUMBIA BANKING SYSTEM INC Files SEC form 10-K, Annual Report EDGAR Online (Fri, Feb 27)
| | Thu, Feb 19, 2009 | | | COLUMBIA BANKING SYSTEM INC Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and E EDGAR Online (Thu, Feb 19)
| | Fri, Jan 30, 2009 | | | COLUMBIA BANKING SYSTEM INC Files SEC form 8-K, Results of Operations and Financial Condition, Other Events EDGAR Online (Fri, Jan 30)
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