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Capital Requirements and Regulatory Restrictions | 12 Months Ended
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Dec. 31, 2012
Banking and Thrift [Abstract] |
Regulatory Capital Requirements under Banking Regulations [Text Block] | Note 2 Capital Requirements and Regulatory Restrictions The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can result in certain mandatory, and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines, the Company and the Bank 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 Company and the Bank’s capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Quantitative measures established by regulators to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of total and Tier I capital to risk-weighted assets, and of Tier I capital to average assets. Management believes that as of December 31, 2012 and 2011, the Company and the Bank met all capital adequacy requirements to which they are subject. Finalization of the Basel III capital standards is expected later in 2013. In 2012, the federal bank regulatory agencies issued a series of proposed rules that would revise their risk-based and leverage capital requirements and their method for calculating risk-weighted assets to make them consistent with the agreements that were reached by the Basel Committee on Banking Supervision in “Basel III: A Global Regulatory Framework for More Resilient Banks and Banking Systems” and certain provisions of the Dodd-Frank Wall Street Reform and Consumer Protection Act. Among other things, the proposed rules establish stricter capital requirements and calculation standards, as well as more restrictive risk weightings for certain loans and facilities. The proposed rules are not expected to be implemented until later in 2013. The Bank is also subject to the regulatory framework for prompt corrective action. As of December 31, 2012 and 2011, the most recent notification from the regulatory agencies categorized the Bank as well-capitalized. To be categorized as well capitalized, the Bank must maintain minimum total risk-based, Tier I risk-based, and Tier I leverage ratios as set forth in the table below. There are no conditions or events since that notification that management believes have changed the Bank’s category. Subsidiary dividends are a significant source of funds for payment of dividends by the Company to its shareholders. At December 31, 2012, unappropriated retained earnings of $23,397,000 were available at the Bank for the declaration of dividends to the Company without prior approval from regulatory authorities. However, dividends paid by the Bank to the Company would be prohibited if the effect thereof would cause the Bank’s capital to be reduced below applicable minimum capital requirements. There were no restricted funds on deposit used to meet regulatory reserve requirements at December 31, 2012 and 2011. The Company’s and the Bank’s actual and required capital amounts and ratios as are as follows:
|  |  |  |  |  |  |  | Capital |  | Requirement to be
|  | Actual |  | Requirements |  | Well Capitalized
(In thousands) |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
At December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  | $ | 175,802 |  | 19.87 | % |  | $ | 70,767 |  | 8.00 | % |  | $ | N/A |  | N/A | %
Cass Commercial Bank |  |  | 75,300 |  | 13.41 |  |  |  | 44,909 |  | 8.00 |  |  |  | 56,136 |  | 10.00 |
Tier I capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 164,729 |  | 18.62 |  |  |  | 35,384 |  | 4.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 68,261 |  | 12.16 |  |  |  | 22,454 |  | 4.00 |  |  |  | 33,682 |  | 6.00 |
Tier I capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 164,729 |  | 12.26 |  |  |  | 40,294 |  | 3.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 68,261 |  | 10.64 |  |  |  | 19,238 |  | 3.00 |  |  |  | 32,063 |  | 5.00 |
At December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  | $ | 166,605 |  | 19.03 | % |  | $ | 70,033 |  | 8.00 | % |  | $ | N/A |  | N/A | %
Cass Commercial Bank |  |  | 66,851 |  | 12.71 |  |  |  | 42,070 |  | 8.00 |  |  |  | 52,588 |  | 10.00 |
Tier I capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 155,638 |  | 17.78 |  |  |  | 35,016 |  | 4.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 60,248 |  | 11.46 |  |  |  | 21,035 |  | 4.00 |  |  |  | 31,553 |  | 6.00 |
Tier I capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 155,638 |  | 11.53 |  |  |  | 40,502 |  | 3.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 60,248 |  | 9.49 |  |  |  | 19,044 |  | 3.00 |  |  |  | 31,741 |  | 5.00 |

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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 1C -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958572-112826 Reference 2: 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=7881181&loc=SL5958573-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 15, 16, 17 -IssueDate 2006-05-01 -Chapter 17 -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 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=7881181&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 1 -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 Reference 6: 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=7881181&loc=SL5958570-112826 Reference 7: 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=7881181&loc=d3e65071-112826 Reference 8: 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=7881181&loc=SL5958569-112826 Reference 9: 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=7881181&loc=SL5958575-112826 Reference 10: 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=7881181&loc=SL5958577-112826 + Details
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