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CAPITAL REQUIREMENTS AND RESTRICTIONS ON RETAINED EARNINGS - Summary Of Capital Adequacy Requirements (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Consolidated |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk Weighted Assets), Actual Amount | $ 870,390 | $ 821,008
Total Capital (to Risk Weighted Assets), Actual Ratio | 0.1547 | 0.1507
Tier I Capital (to Risk Weighted Assets), Actual Amount | $ 799,929 | $ 752,751
Tier I Capital (to Risk Weighted Assets), Actual Ratio | 0.1421 | 0.1382
Common Equity Tier 1 (CET1), Actual Amount | $ 799,929 | $ 752,751
Common Equity Tier 1 (CET1), Actual Ratio | 14.21% | 13.82%
Tier I Capital (to Average Assets), Actual Amount | $ 799,929 | $ 752,751
Tier I Capital (to Average Assets), Actual Ratio | 0.1182 | 0.1150
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 450,211 | $ 435,786
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0800 | 0.0800
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 337,658 | $ 326,840
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0600 | 0.0600
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount | $ 253,243 | $ 245,130
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio | 4.50% | 4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 270,636 | $ 261,859
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0400 | 0.0400
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 590,901 | $ 571,969
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 478,349 | 463,023
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 393,934 | 381,313
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | 270,636 | 261,859
Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital (to Risk Weighted Assets), Actual Amount | $ 852,405 | $ 801,044
Total Capital (to Risk Weighted Assets), Actual Ratio | 0.1516 | 0.1474
Tier I Capital (to Risk Weighted Assets), Actual Amount | $ 781,999 | $ 732,966
Tier I Capital (to Risk Weighted Assets), Actual Ratio | 0.1391 | 0.1349
Common Equity Tier 1 (CET1), Actual Amount | $ 781,999 | $ 732,966
Common Equity Tier 1 (CET1), Actual Ratio | 13.91% | 13.49%
Tier I Capital (to Average Assets), Actual Amount | $ 781,999 | $ 732,966
Tier I Capital (to Average Assets), Actual Ratio | 0.1158 | 0.1122
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 449,894 | $ 434,758
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0800 | 0.0800
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 337,420 | $ 326,069
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0600 | 0.0600
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount | $ 253,065 | $ 244,551
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio | 4.50% | 4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount | $ 270,041 | $ 261,222
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio | 0.0400 | 0.0400
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 590,486 | $ 570,620
Excess Capital to Risk Weighted Assets, For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 0.1050 | 0.1050
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 478,012 | $ 461,930
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 0.0850 | 0.0850
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 393,657 | $ 380,413
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 7.00% | 7.00%
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount | $ 270,041 | $ 261,222
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio | 0.0400 | 0.0400
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 562,367 | $ 543,448
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 0.1000 | 0.1000
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 449,894 | $ 434,758
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 0.0800 | 0.0800
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 365,539 | $ 353,241
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 6.50% | 6.50%
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount | $ 337,551 | $ 326,527
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio | 0.0500 | 0.0500

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