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Capital Requirements and Regulatory Restrictions | 12 Months Ended
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Dec. 31, 2017
Regulatory Capital Requirements [Abstract] |
Capital Requirements and Regulatory Restrictions | 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’s 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 and common equity Tier I capital to risk-weighted assets, and of Tier I capital to average assets. Management believes that as of December 31, 2017 and 2016, the Company and the Bank met all capital adequacy requirements to which they are subject. Effective July 2, 2013, the Federal Reserve Board approved final rules known as the “Basel III Capital Rules” that substantially revised the risk-based capital and leverage capital requirements applicable to bank holding companies and depository institutions, including the Company and the Bank. The Basel III Capital Rules implement aspects of the Basel III capital framework agreed upon by the Basel Committee and incorporate changes required by the Dodd-Frank Wall Street Reform and Consumer Protection Act. Among other things, the Basel III Capital Rules establish stricter capital requirements and calculation standards, as well as more restrictive risk weightings for certain loans and facilities. The Basel III Capital Rules were effective for the Company and the Bank on January 1, 2015 (subject to a phase-in period). The Bank is also subject to the regulatory framework for prompt corrective action. As of December 31, 2017, 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, common equity Tier I 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 can be a significant source of funds for payment of dividends by the Company to its shareholders. At December 31, 2017, unappropriated retained earnings of $30,137,000 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, 2017 and 2016. The Company’s and the Bank’s actual and required capital amounts and ratios are as follows:
|  |  |  |  |  |  |  | Capital |  | Requirement to be
|  | Actual |  | Requirements |  | Well-Capitalized
(In thousands) |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
At December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  | $ | 234,389 |  | 22.53 | % |  | $ | 83,233 |  | 8.00 | % |  | $ | N/A |  | N/A | %
Cass Commercial Bank |  |  | 122,440 |  | 17.01 |  |  |  | 57,568 |  | 8.00 |  |  |  | 71,960 |  | 10.00 |
Common Equity Tier I Capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 224,184 |  | 21.55 |  |  |  | 46,819 |  | 4.50 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 114,603 |  | 15.93 |  |  |  | 32,382 |  | 4.50 |  |  |  | 46,774 |  | 6.50 |
Tier I capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 224,184 |  | 21.55 |  |  |  | 62,425 |  | 6.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 114,603 |  | 15.93 |  |  |  | 43,176 |  | 6.00 |  |  |  | 57,568 |  | 8.00 |
Tier I capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 224,184 |  | 13.87 |  |  |  | 64,649 |  | 4.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 114,603 |  | 14.99 |  |  |  | 30,581 |  | 4.00 |  |  |  | 38,227 |  | 5.00 |
At December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  | $ | 219,747 |  | 22.75 | % |  | $ | 77,272 |  | 8.00 | % |  | $ | N/A |  | N/A | %
Cass Commercial Bank |  |  | 110,576 |  | 16.72 |  |  |  | 52,898 |  | 8.00 |  |  |  | 66,123 |  | 10.00 |
Common Equity Tier I Capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 209,572 |  | 21.70 |  |  |  | 43,466 |  | 4.50 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 102,769 |  | 15.54 |  |  |  | 29,755 |  | 4.50 |  |  |  | 42,980 |  | 6.50 |
Tier I capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 209,572 |  | 21.70 |  |  |  | 57,954 |  | 6.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 102,769 |  | 15.54 |  |  |  | 39,674 |  | 6.00 |  |  |  | 52,898 |  | 8.00 |
Tier I capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cass Information Systems, Inc. |  |  | 209,572 |  | 13.83 |  |  |  | 60,620 |  | 4.00 |  |  |  | N/A |  | N/A |
Cass Commercial Bank |  |  | 102,769 |  | 13.98 |  |  |  | 29,409 |  | 4.00 |  |  |  | 36,761 |  | 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 1G -URI http://asc.fasb.org/extlink&oid=84167132&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 1C -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958572-112826 Reference 3: 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=84167132&loc=SL5958574-112826 Reference 4: 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=84167132&loc=d3e65071-112826 Reference 5: 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=84167132&loc=SL5958569-112826 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=84167132&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 1F -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958575-112826 Reference 8: 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=84167132&loc=SL5958568-112826 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=84167132&loc=SL5958573-112826 + Details
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