REGULATORY CAPITAL REQUIREMENTS (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Total Capital, Actual	$ 564,967	$ 557,571
Banking Regulation, Total Risk-Based Capital Ratio, Actual	0.1395	0.1380
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.1050	0.1050
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum	0.1000	0.1000
Banking Regulation, Tier One Risk-Based Capital, Actual	$ 524,843	$ 517,385
Banking Regulation, Tier One Risk-Based Capital Ratio, Actual	0.1296	0.1281
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.0850	0.0850
Banking Regulation, Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum	0.0600	0.0600
Common equity tier I capital	$ 481,843	$ 474,385
Common Equity Tier I Risk Based Capital Ratio	11.90%	11.74%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	7.00%	7.00%
Banking Regulation, Tier One Leverage Capital, Actual	$ 524,843	$ 517,385
Banking Regulation, Excess Tier One Leverage Capital Ratio, Actual	0.0924	0.0922
Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum	0.0400	0.0400
Subsidiaries
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Total Capital, Actual	$ 532,658	$ 525,346
Banking Regulation, Total Risk-Based Capital Ratio, Actual	0.1318	0.1303
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.1050	0.1050
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum	0.1000	0.1000
Banking Regulation, Tier One Risk-Based Capital, Actual	$ 492,534	$ 485,160
Banking Regulation, Tier One Risk-Based Capital Ratio, Actual	0.1219	0.1203
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.0850	0.0850
Banking Regulation, Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum	0.0800	0.0800
Common equity tier I capital	$ 492,534	$ 485,160
Common Equity Tier I Risk Based Capital Ratio	12.19%	12.03%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	7.00%	7.00%
Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Banking Regulation, Tier One Leverage Capital, Actual	$ 492,534	$ 485,160
Banking Regulation, Excess Tier One Leverage Capital Ratio, Actual	0.0868	0.0865
Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum	0.0400	0.0400
Banking Regulation, Tier One Leverage Capital Ratio, Well Capitalized, Minimum	0.0500	0.0500