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Capital Requirements | 3 Months Ended
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Mar. 31, 2018
Regulatory Capital Requirements [Abstract] |
Capital Requirements | Capital Requirements The Bank is 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 Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of their 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. The final rules implementing the Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective January 1, 2015, with full compliance of all the requirements being phased in over a multi-year schedule, and becoming fully phased in by January 1, 2019. As part of the new requirements, the common equity Tier 1 capital ratio is calculated and utilized in the assessment of capital for all institutions. The final rules also established a “capital conservation buffer” above the new regulatory minimum capital requirements. The capital conservation buffer is being phased-in over four years, which began on January 1, 2016. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the following table) of total (as defined in the regulations), Tier 1 (as defined), and common equity Tier 1 capital (as defined) to risk-weighted assets (as defined), and of Tier 1 capital to average assets. Management believes, as of March 31, 2018 and December 31, 2017, that the Bank met all capital adequacy requirements to which it is subject. As of March 31, 2018, the most recent notification from the Federal Reserve Bank categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Bank must maintain minimum risk-based capital and leverage ratios as set forth in the following table. There are no conditions or events since that notification that management believes have changed the Bank’s category. A comparison of the capital of the Bank at March 31, 2018 and December 31, 2017 with the minimum regulatory guidelines were as follows (dollars in thousands):
| Actual |  | Minimum Capital Requirement |  | Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
March 31, 2018 |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) | $ | 69,435 |  |  | 13.52 | % |  | $ | 41,075 |  |  | 8.00 | % |  | $ | 51,344 |  |  | 10.00 | %
Tier 1 Capital (to Risk-Weighted Assets) | $ | 64,163 |  |  | 12.50 | % |  | $ | 30,806 |  |  | 6.00 | % |  | $ | 41,075 |  |  | 8.00 | %
Common Equity Tier 1 Capital (to Risk-Weighted Assets) | $ | 64,163 |  |  | 12.50 | % |  | $ | 23,105 |  |  | 4.50 | % |  | $ | 33,373 |  |  | 6.50 | %
Tier 1 Capital (to Average Assets) | $ | 64,163 |  |  | 8.55 | % |  | $ | 30,014 |  |  | 4.00 | % |  | $ | 37,517 |  |  | 5.00 | %
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) | $ | 67,624 |  |  | 13.12 | % |  | $ | 41,239 |  |  | 8.00 | % |  | $ | 51,548 |  |  | 10.00 | %
Tier 1 Capital (to Risk-Weighted Assets) | $ | 62,298 |  |  | 12.09 | % |  | $ | 30,929 |  |  | 6.00 | % |  | $ | 41,239 |  |  | 8.00 | %
Common Equity Tier 1 Capital (to Risk-Weighted Assets) | $ | 62,298 |  |  | 12.09 | % |  | $ | 23,197 |  |  | 4.50 | % |  | $ | 33,506 |  |  | 6.50 | %
Tier 1 Capital (to Average Assets) | $ | 62,298 |  |  | 8.46 | % |  | $ | 29,457 |  |  | 4.00 | % |  | $ | 36,821 |  |  | 5.00 | %
In addition to the regulatory minimum risk-based capital amounts presented above, the Bank must maintain a capital conservation buffer as required by the Basel III final rules. The buffer began applying to the Bank on January 1, 2016, and is subject to phase-in from 2016 to 2019 in equal annual installments of 0.625%. Accordingly, the Bank was required to maintain a capital conservation buffer of 1.875% and 1.25% at March 31, 2018 and December 31, 2017, respectively. Under the final rules, an institution is subject to limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses if its capital level falls below the buffer amount. As of March 31, 2018 and December 31, 2017, the capital conservation buffer of the Bank was 5.52% and 5.12%, respectively.

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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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