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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Impact to Financial Statements Upon Adoption of ASC 326 (Details) - USD ($)
$ in Thousands
Jan. 01, 2022
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]          
Allowance for credit losses on off-balance sheet commitments $ (137)        
Total impact from ASC 326 adoption 3,909 $ 582,379 $ 583,681 $ 554,958 $ 532,980
Tax Effect [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Allowance for credit losses on off-balance sheet commitments 51        
Total impact from ASC 326 adoption (1,439)        
Impact to Consolidated Statement of Condition from ASC-326 Adoption [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Allowance for credit losses on off-balance sheet commitments (188)        
Total impact from ASC 326 adoption 5,348        
Allowance For Credit Losses on Loans [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Assets 4,046        
Allowance For Credit Losses on Loans [Member] | Tax Effect [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Assets (1,490)        
Allowance For Credit Losses on Loans [Member] | Impact to Consolidated Statement of Condition from ASC-326 Adoption [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Assets $ 5,536