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REGULATORY CAPITAL MATTERS - Actual and Required Capital Amounts and Ratios (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Banc of California, NA |  |
Total risk-based capital |  |
Total risk-based capital ratio, actual amount | $ 1,131,057 | $ 1,042,617
Total risk-based capital ratio, actual ratio | 16.56% | 14.73%
Total risk-based capital ratio, minimum capital requirements amount | $ 546,359 | $ 566,405
Total risk-based capital ratio, minimum capital requirements ratio | 8.00% | 8.00%
Total risk-based capital ratio, minimum required to be well capitalized under prompt corrective action provisions amount | $ 682,949 | $ 708,007
Total risk-based capital ratio, minimum required to be well capitalized under prompt corrective action provisions ratio | 10.00% | 10.00%
Tier 1 risk-based capital |  |
Tier 1 risk-based capital ratio, actual amount | $ 1,078,008 | $ 999,788
Tier 1 risk-based capital ratio, actual ratio | 15.78% | 14.12%
Tier 1 risk-based capital ratio, minimum capital requirements amount | $ 409,769 | $ 424,804
Tier 1 risk-based capital ratio, minimum capital requirements ratio | 6.00% | 6.00%
Tier 1 risk-based capital ratio, minimum required to be well capitalized under prompt corrective action provisions amount | $ 546,359 | $ 566,405
Tier 1 risk-based capital ratio, minimum required to be well capitalized under prompt corrective action provisions ratio | 8.00% | 8.00%
Common equity tier 1 capital |  |
Common equity tier 1 capital ratio, actual amount | $ 1,078,008 | $ 999,788
Common equity tier 1 capital ratio, actual ratio | 15.78% | 14.12%
Common equity tier 1 capital ratio, minimum capital requirements amount | $ 307,327 | $ 318,603
Common equity tier 1 capital ratio, minimum capital requirements ratio | 4.50% | 4.50%
Common equity tier 1 capital ratio, minimum required to be well capitalized under prompt corrective action provisions amount | $ 443,917 | $ 460,204
Common equity tier 1 capital ratio, minimum required to be well capitalized under prompt corrective action provisions ratio | 6.50% | 6.50%
Tier 1 leverage |  |
Tier 1 leverage ratio, actual amount | $ 1,078,008 | $ 999,788
Tier 1 leverage ratio, actual ratio | 10.67% | 8.71%
Tier 1 leverage ratio, minimum capital requirements amount | $ 404,060 | $ 459,368
Tier 1 leverage ratio, minimum capital requirements ratio | 4.00% | 4.00%
Tier 1 leverage ratio, minimum required to be well capitalized under prompt corrective action provisions amount | $ 505,074 | $ 574,210
Tier 1 leverage ratio, minimum required to be well capitalized under prompt corrective action provisions ratio | 5.00% | 5.00%
Banc of California, Inc. |  |
Total risk-based capital |  |
Total risk-based capital ratio, actual amount | $ 1,002,200 | $ 975,918
Total risk-based capital ratio, actual ratio | 14.56% | 13.70%
Total risk-based capital ratio, minimum capital requirements amount | $ 550,499 | $ 569,856
Total risk-based capital ratio, minimum capital requirements ratio | 8.00% | 8.00%
Tier 1 risk-based capital |  |
Tier 1 risk-based capital ratio, actual amount | $ 949,151 | $ 941,429
Tier 1 risk-based capital ratio, actual ratio | 13.79% | 13.22%
Tier 1 risk-based capital ratio, minimum capital requirements amount | $ 412,874 | $ 427,392
Tier 1 risk-based capital ratio, minimum capital requirements ratio | 6.00% | 6.00%
Common equity tier 1 capital |  |
Common equity tier 1 capital ratio, actual amount | $ 682,539 | $ 672,358
Common equity tier 1 capital ratio, actual ratio | 9.92% | 9.44%
Common equity tier 1 capital ratio, minimum capital requirements amount | $ 309,656 | $ 320,544
Common equity tier 1 capital ratio, minimum capital requirements ratio | 4.50% | 4.50%
Tier 1 leverage |  |
Tier 1 leverage ratio, actual amount | $ 949,151 | $ 941,429
Tier 1 leverage ratio, actual ratio | 9.39% | 8.17%
Tier 1 leverage ratio, minimum capital requirements amount | $ 404,339 | $ 460,840
Tier 1 leverage ratio, minimum capital requirements ratio | 4.00% | 4.00%

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- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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