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Shareholders' Equity, Dividends Restrictions and Other Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements | Following is an analysis of capital ratios under Basel III guidelines for BancShares and FCB as of December 31, 2020 and 2019:
|  |  | December 31, 2020 |  | December 31, 2019
(Dollars in thousands) | Requirements to be well-capitalized |  | Amount |  | Ratio |  | Amount |  | Ratio
BancShares |  |  |  |  |  |  |  |  |
Total risk-based capital | 10.00 | % |  | $ | 4,577,212 |  |  | 13.81 | % |  | $ | 3,731,501 |  |  | 12.12 | %
Tier 1 risk-based capital | 8.00 |  |  | 3,856,086 |  |  | 11.63 |  |  | 3,344,305 |  |  | 10.86 |
Common equity Tier 1 | 6.50 |  |  | 3,516,149 |  |  | 10.61 |  |  | 3,344,305 |  |  | 10.86 |
Leverage capital | 5.00 |  |  | 3,856,086 |  |  | 7.86 |  |  | 3,344,305 |  |  | 8.81 |
FCB |  |  |  |  |  |  |  |  |
Total risk-based capital | 10.00 |  |  | 4,543,496 |  |  | 13.72 |  |  | 3,837,670 |  |  | 12.46 |
Tier 1 risk-based capital | 8.00 |  |  | 4,276,870 |  |  | 12.92 |  |  | 3,554,974 |  |  | 11.54 |
Common equity Tier 1 | 6.50 |  |  | 4,276,870 |  |  | 12.92 |  |  | 3,554,974 |  |  | 11.54 |
Leverage capital | 5.00 |  |  | 4,276,870 |  |  | 8.72 |  |  | 3,554,974 |  |  | 9.38 |

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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