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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2020
Banking and Thrift, Interest [Abstract] |
Summary of Regulatory Capital Amounts and Ratios | The following is a summary of the Bank’s and the Company’s regulatory capital amounts and ratios as of December 31, 2020 and 2019 compared to the regulatory minimum capital adequacy requirements and the regulatory requirements for classification as a well-capitalized institution then in effect (dollars in thousands):
As of December 31, 2020 | Actual |  | For capital adequacy purposes |  | To be well-capitalized under prompt corrective action
Bank: | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Tier 1 capital (to average assets) | $ | 942,122 |  |  | 8.48 | % |  | $ | 444,648 |  |  | 4.00 | % |  | $ | 555,810 |  |  | 5.00 | %
Common equity Tier 1 (to risk-weighted assets) | 942,122 |  |  | 12.11 |  |  | 544,625 |  |  | 7.00 |  | (1) | 505,724 |  |  | 6.50 |
Tier 1 capital (to risk-weighted assets) | 942,122 |  |  | 12.11 |  |  | 661,331 |  |  | 8.50 |  | (1) | 622,429 |  |  | 8.00 |
Total capital (to risk-weighted assets) | 1,004,480 |  |  | 12.91 |  |  | 816,938 |  |  | 10.50 |  | (1) | 778,036 |  |  | 10.00 |
Company: |  |  |  |  |  |  |  |  |  |  |
Tier 1 capital (to average assets) | $ | 998,273 |  |  | 9.44 | % |  | $ | 423,028 |  |  | 4.00 | % |  | N/A |  | N/A
Common equity Tier 1 (to risk-weighted assets) | 871,385 |  |  | 11.05 |  |  | 552,075 |  |  | 7.00 |  | (1) | N/A |  | N/A
Tier 1 capital (to risk-weighted assets) | 998,273 |  |  | 12.66 |  |  | 670,377 |  |  | 8.50 |  | (1) | N/A |  | N/A
Total capital (to risk-weighted assets) | 1,230,370 |  |  | 15.60 |  |  | 828,113 |  |  | 10.50 |  | (1) | N/A |  | N/A
As of December 31, 2019 | Actual |  | For capital adequacy purposes |  | To be well-capitalized under prompt corrective action
Bank: | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Tier 1 capital (to average assets) | $ | 779,108 |  |  | 10.03 | % |  | $ | 310,798 |  |  | 4.00 | % |  | $ | 388,498 |  |  | 5.00 | %
Common equity Tier 1 (to risk-weighted assets) | 779,108 |  |  | 12.98 |  |  | 420,106 |  |  | 7.00 |  | (1) | 390,099 |  |  | 6.50 |
Tier 1 capital (to risk-weighted assets) | 779,108 |  |  | 12.98 |  |  | 510,129 |  |  | 8.50 |  | (1) | 480,121 |  |  | 8.00 |
Total capital (to risk-weighted assets) | 797,339 |  |  | 13.29 |  |  | 630,159 |  |  | 10.50 |  | (1) | 600,152 |  |  | 10.00 |
Company: |  |  |  |  |  |  |  |  |  |  |
Tier 1 capital (to average assets) | $ | 791,746 |  |  | 10.17 | % |  | $ | 311,289 |  |  | 4.00 | % |  | N/A |  | N/A
Common equity Tier 1 (to risk-weighted assets) | 729,095 |  |  | 12.14 |  |  | 420,273 |  |  | 7.00 |  | (1) | N/A |  | N/A
Tier 1 capital (to risk-weighted assets) | 791,746 |  |  | 13.19 |  |  | 510,331 |  |  | 8.50 |  | (1) | N/A |  | N/A
Total capital (to risk-weighted assets) | 844,977 |  |  | 14.07 |  |  | 630,409 |  |  | 10.50 |  | (1) | N/A |  | N/A
(1) Includes the Capital Conservation Buffer of 2.50%.

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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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