CAPITAL REQUIREMENTS AND RESTRICTIONS ON RETAINED EARNINGS - Summary Of Capital Adequacy Requirements (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Consolidated
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets), Actual Amount	$ 821,008	$ 744,421
Total Capital (to Risk Weighted Assets), Actual Ratio	0.1507	0.1535
Tier I Capital (to Risk Weighted Assets), Actual Amount	$ 752,751	$ 683,754
Tier I Capital (to Risk Weighted Assets), Actual Ratio	0.1382	0.1410
Common Equity Tier 1 (CET1), Actual Amount	$ 752,751	$ 683,754
Common Equity Tier 1 (CET1), Actual Ratio	13.82%	14.10%
Tier I Capital (to Average Assets), Actual Amount	$ 752,751	$ 683,754
Tier I Capital (to Average Assets), Actual Ratio	0.1150	0.1073
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 435,786	$ 388,020
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	$ 326,840	$ 291,015
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	$ 245,130	$ 218,261
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	$ 261,859	$ 254,898
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	$ 571,969	$ 509,276
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	463,023	412,271
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	381,313	339,518
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	261,859	254,898
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets), Actual Amount	$ 801,044	$ 726,091
Total Capital (to Risk Weighted Assets), Actual Ratio	0.1474	0.1501
Tier I Capital (to Risk Weighted Assets), Actual Amount	$ 732,966	$ 665,424
Tier I Capital (to Risk Weighted Assets), Actual Ratio	0.1349	0.1375
Common Equity Tier 1 (CET1), Actual Amount	$ 732,966	$ 665,424
Common Equity Tier 1 (CET1), Actual Ratio	13.49%	13.75%
Tier I Capital (to Average Assets), Actual Amount	$ 732,966	$ 665,424
Tier I Capital (to Average Assets), Actual Ratio	0.1122	0.1046
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 434,758	$ 387,118
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	$ 326,069	$ 290,339
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	$ 244,551	$ 217,754
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	$ 261,222	$ 254,425
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	$ 570,620	$ 508,093
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	$ 461,930	$ 411,313
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	$ 380,413	$ 338,729
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	$ 261,222	$ 254,425
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	$ 543,448	$ 483,898
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	$ 434,758	$ 387,118
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	$ 353,241	$ 314,534
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	$ 326,527	$ 318,030
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	0.0500	0.0500