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CAPITAL REQUIREMENTS AND RESTRICTIONS ON RETAINED EARNINGS - Summary Of Capital Adequacy Requirements (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Consolidated |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk Weighted Assets), Actual Amount | $ 744,421 | $ 682,778
Total Capital (to Risk Weighted Assets), Actual Ratio | 15.35 | 14.65
Tier I Capital (to Risk Weighted Assets), Actual Amount | $ 683,754 | $ 624,381
Tier I Capital (to Risk Weighted Assets), Actual Ratio | 14.10 | 13.39
Common Equity Tier 1 (CET1), Actual Amount | $ 683,754 | $ 624,381
Common Equity Tier 1 (CET1), Actual Ratio | 1410.00% | 1339.00%
Tier I Capital (to Average Assets), Actual Amount | $ 683,754 | $ 624,381
Tier I Capital (to Average Assets), Actual Ratio | 10.73 | 10.93
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 388,020 | $ 372,921
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 8.00 | 8.00
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 291,015 | $ 279,691
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 6.00 | 6.00
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount | $ 218,261 | $ 209,768
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio | 450.00% | 450.00%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 254,898 | $ 228,406
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio | 4.00 | 4.00
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 509,276 | $ 489,459
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 412,271 | 396,229
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 339,518 | 326,306
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 254,898 | 228,406
Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk Weighted Assets), Actual Amount | $ 726,091 | $ 678,034
Total Capital (to Risk Weighted Assets), Actual Ratio | 15.01 | 14.56
Tier I Capital (to Risk Weighted Assets), Actual Amount | $ 665,424 | $ 619,693
Tier I Capital (to Risk Weighted Assets), Actual Ratio | 13.75 | 13.31
Common Equity Tier 1 (CET1), Actual Amount | $ 665,424 | $ 619,693
Common Equity Tier 1 (CET1), Actual Ratio | 1375.00% | 1331.00%
Tier I Capital (to Average Assets), Actual Amount | $ 665,424 | $ 619,693
Tier I Capital (to Average Assets), Actual Ratio | 10.46 | 10.88
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 387,118 | $ 372,560
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 8.00 | 8.00
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 290,339 | $ 279,420
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 6.00 | 6.00
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount | $ 217,754 | $ 209,565
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio | 450.00% | 450.00%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 254,425 | $ 227,900
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio | 4.00 | 4.00
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 508,093 | $ 488,985
Excess Capital to Risk Weighted Assets, For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 10.50 | 10.50
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 411,313 | $ 395,845
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 8.50 | 8.50
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 338,729 | $ 325,990
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 700.00% | 700.00%
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 254,425 | $ 227,900
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 4.00 | 4.00
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 483,898 | $ 465,700
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 10.00 | 10.00
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 387,118 | $ 372,560
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 8.00 | 8.00
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 314,534 | $ 302,705
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 650.00% | 650.00%
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 318,030 | $ 284,875
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 5.00 | 5.00

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