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REGULATORY CAPITAL (Summary of actual capital amounts and ratios) (Details) $ in Thousands | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total capital (to risk-weighted assets), Actual Amount | $ 410,959 | $ 350,403
Total capital (to risk-weighted assets), Actual Ratio | 12.7 | 12.5
Total capital (to risk-weighted assets), For Capital Adequacy Amount | $ 257,941 |
Total capital (to risk-weighted assets), For Capital Adequacy Ratio | 8.0 |
Tier 1 common equity (to risk-weighted assets), Actual Amount | $ 324,592 | $ 282,646
Tier 1 common equity (to risk-weighted assets), Actual Ratio | 10.1 | 10.1
Tier 1 common equity (to risk-weighted assets), For Capital Adequacy Amount | $ 145,092 |
Tier 1 common equity (to risk-weighted assets), For Capital Adequacy Ratio | 4.50% |
Tier 1 capital (to risk-weighted assets), Actual Amount | $ 350,714 | $ 308,769
Tier 1 capital (to risk-weighted assets), Actual Ratio | 10.9 | 11.0
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Amount | $ 193,456 |
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Ratio | 6.0 |
Tier 1 capital (to average assets), Actual Amount | $ 350,714 | $ 308,769
Tier 1 capital (to average assets), Actual Ratio | 8.5 | 9.4
Tier 1 capital (to average assets), For Capital Adequacy Amount | $ 165,767 |
Tier 1 capital (to average assets), For Capital Adequacy Ratio | 4.0 |
Total capital (to risk-weighted assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Amount |  | $ 223,973
Total capital (to risk-weighted assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Ratio |  | 8.00%
Tier 1 common equity (to risk-weighted assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Amount |  | $ 125,985
Tier 1 common equity (to risk-weighted assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Ratio |  | 4.50%
Tier 1 capital (to risk-weighted assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Amount |  | $ 167,980
Tier 1 capital (to risk-weighted assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Ratio |  | 6.00%
Tier 1 capital (to average assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Amount |  | $ 131,087
Tier 1 capital (to average assets), Minimum for Capital Adequacy plus Capital Conservation Buffer Ratio |  | 4.00%
Metropolitan Commercial Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total capital (to risk-weighted assets), Actual Amount | $ 410,295 | $ 356,353
Total capital (to risk-weighted assets), Actual Ratio | 12.7 | 12.7
Total capital (to risk-weighted assets), For Capital Adequacy Amount | $ 257,827 | $ 223,858
Total capital (to risk-weighted assets), For Capital Adequacy Ratio | 8.0 | 8.0
Total capital (to risk-weighted assets), To be Well Capitalized under Prompt Corrective Action Regulations Amount | $ 322,284 | $ 279,823
Total capital (to risk-weighted assets), To be Well Capitalized under Prompt Corrective Action Regulations Ratio | 10.0 | 10.0
Tier 1 common equity (to risk-weighted assets), Actual Amount | $ 374,712 | $ 329,905
Tier 1 common equity (to risk-weighted assets), Actual Ratio | 11.6 | 11.8
Tier 1 common equity (to risk-weighted assets), For Capital Adequacy Amount | $ 145,028 | $ 125,920
Tier 1 common equity (to risk-weighted assets), For Capital Adequacy Ratio | 4.50% | 4.50%
Tier 1 common equity (to risk-weighted assets), To be Well Capitalized under Prompt Corrective Action Regulations Amount | $ 209,485 | $ 181,885
Tier 1 common equity (to risk-weighted assets), To be Well Capitalized under Prompt Corrective Action Regulations Ratio | 6.50% | 6.50%
Tier 1 capital (to risk-weighted assets), Actual Amount | $ 374,712 | $ 329,905
Tier 1 capital (to risk-weighted assets), Actual Ratio | 11.6 | 11.8
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Amount | $ 193,370 | $ 167,894
Tier 1 capital (to risk-weighted assets), For Capital Adequacy Ratio | 6.0 | 6.0
Tier 1 capital (to risk-weighted assets), To be Well Capitalized under Prompt Corrective Action Regulations Amount | $ 257,827 | $ 223,858
Tier 1 capital (to risk-weighted assets), To be Well Capitalized under Prompt Corrective Action Regulations Ratio | 8.0 | 8.0
Tier 1 capital (to average assets), Actual Amount | $ 374,712 | $ 329,905
Tier 1 capital (to average assets), Actual Ratio | 9.0 | 10.1
Tier 1 capital (to average assets), For Capital Adequacy Amount | $ 165,704 | $ 131,000
Tier 1 capital (to average assets), For Capital Adequacy Ratio | 4.0 | 4.0
Tier 1 capital (to average assets), To be Well Capitalized under Prompt Corrective Action Regulations Amount | $ 207,130 | $ 163,750
Tier 1 capital (to average assets), To be Well Capitalized under Prompt Corrective Action Regulations Ratio | 5.0 | 5.0

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