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Regulatory Capital Requirements | 12 Months Ended
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Dec. 31, 2011
Regulatory Capital Requirements [Abstract] |
Regulatory Capital Requirements | Regulatory Capital Requirements The Company (on a consolidated basis) and its banking subsidiary are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company and its subsidiary's financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and its banking subsidiary must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. Quantitative measures established by regulation to ensure capital adequacy require the Company and its banking subsidiary to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital to risk-weighted assets (as defined in the regulations) and of Tier 1 capital to average assets (as defined in the regulations). Management believes, as of December 31, 2011 and 2010, that the Company and Columbia Bank met all capital adequacy requirements to which they are subject. As of December 31, 2011, the most recent notification from the Federal Deposit Insurance Corporation categorized Columbia Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the following tables. There are no conditions or events since the notification that management believes have changed Columbia Bank’s category. The Company and its banking subsidiary’s actual capital amounts and ratios as of December 31, 2011 and 2010, are also presented in the following table.
|  | Actual |  | For Capital Adequacy Purposes |  | To Be Well Capitalized Under Prompt Corrective Action Provision
Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
|  | (dollars in thousands)
As of December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
The Company |  | $ | 636,559 |  |  | 21.05 | % |  | $ | 241,955 |  |  | 8.0 | % |  | N/A |  |  | N/A |
Columbia Bank |  | $ | 561,216 |  |  | 18.55 | % |  | $ | 242,028 |  |  | 8.0 | % |  | $ | 302,535 |  |  | 10.0 | %
Tier 1 Capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
The Company |  | $ | 598,485 |  |  | 19.79 | % |  | $ | 120,978 |  |  | 4.0 | % |  | N/A |  |  | N/A |
Columbia Bank |  | $ | 523,131 |  |  | 17.29 | % |  | $ | 121,014 |  |  | 4.0 | % |  | $ | 181,521 |  |  | 6.0 | %
Tier 1 Capital (to average assets): |  |  |  |  |  |  |  |  |  |  |  |
The Company |  | $ | 598,485 |  |  | 12.96 | % |  | $ | 184,780 |  |  | 4.0 | % |  | N/A |  |  | N/A |
Columbia Bank |  | $ | 523,131 |  |  | 11.45 | % |  | $ | 182,747 |  |  | 4.0 | % |  | $ | 228,434 |  |  | 5.0 | %
As of December 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
The Company |  | $ | 623,526 |  |  | 24.47 | % |  | $ | 203,871 |  |  | 8.0 | % |  | N/A |  |  | N/A |
Columbia Bank |  | $ | 463,587 |  |  | 18.20 | % |  | $ | 203,789 |  |  | 8.0 | % |  | $ | 254,736 |  |  | 10.0 | %
Tier 1 Capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
The Company |  | $ | 591,263 |  |  | 23.20 | % |  | $ | 101,936 |  |  | 4.0 | % |  | N/A |  |  | N/A |
Columbia Bank |  | $ | 431,337 |  |  | 16.93 | % |  | $ | 101,894 |  |  | 4.0 | % |  | $ | 152,841 |  |  | 6.0 | %
Tier 1 Capital (to average assets): |  |  |  |  |  |  |  |  |  |  |  |
The Company |  | $ | 591,263 |  |  | 13.99 | % |  | $ | 169,062 |  |  | 4.0 | % |  | N/A |  |  | N/A |
Columbia Bank |  | $ | 431,337 |  |  | 10.33 | % |  | $ | 166,961 |  |  | 4.0 | % |  | $ | 208,702 |  |  | 5.0 | %

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- Definition The entire disclosure for banks, savings institutions, and credit unions, for regulatory capital requirements imposed by the Federal Reserve System (FRB), the Federal Deposit Insurance Corporation (FDIC), the Office of Thrift Supervision (OTS) or for any state imposed capital requirements, as applicable. The disclosure may include (1) a description of regulatory capital requirements (a) for capital adequacy purposes and (b) established by the prompt corrective action provisions of Section 38 of the Federal Depository Insurance Act; (2) the actual or possible material effects of noncompliance with such requirements; (3) whether the entity is in compliance with the regulatory capital requirements including (a) required and actual ratios and amounts of Tier 1 leverage, Tier 1 risk-based, and total risk-based capital, tangible capital (for savings institutions), and Tier 3 capital for market risk (for certain banks and bank holding companies), (b) factors that may significantly affect capital adequacy; (4) the prompt corrective action category in which the entity was classified as of its most recent notification; (5) whether management believes any conditions or events since notification have changed the entity's category. Also may include additional information that might be disclosed in situations where substantial doubt about the entity's ability to continue as a going concern for a reasonable period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958577-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958570-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958568-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1E -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958574-112826 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -URI http://asc.fasb.org/extlink&oid=6918689&loc=d3e65071-112826 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 17 -Paragraph 15, 16, 17 -IssueDate 2006-05-01 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1C -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958572-112826 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1F -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958575-112826 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1D -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958573-112826 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958569-112826 + Details
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