FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value of Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	$ 1,257,101	$ 1,751,832
Loans held for sale	4,443	7,678
Derivative Assets	12,825
Derivative Liabilities	12,825
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	1,257,101	1,751,832
Loans held for sale	4,443	7,678
Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	12,825
Derivative Liabilities	12,825
Interest rate swaps | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	12,825
Derivative Liabilities	12,825
U.S Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	123,854	135,158
Obligations of U.S. government agencies and sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	144,369	183,021
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	457,857	708,502
Mortgage-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	490,139	688,298
Corporate obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	40,882	36,853
Quoted Prices in Active Markets For Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	123,854	135,158
Loans held for sale	0	0
Derivative Assets	0
Derivative Liabilities	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0
Derivative Liabilities	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | U.S Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	123,854	135,158
Quoted Prices in Active Markets For Identical Assets (Level 1) | Obligations of U.S. government agencies and sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Mortgage-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Corporate obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	1,118,099	1,596,508
Loans held for sale	4,443	7,678
Derivative Assets	12,825
Derivative Liabilities	12,825
Significant Other Observable Inputs (Level 2) | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	12,825
Derivative Liabilities	12,825
Significant Other Observable Inputs (Level 2) | U.S Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Significant Other Observable Inputs (Level 2) | Obligations of U.S. government agencies and sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	144,369	183,021
Significant Other Observable Inputs (Level 2) | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	442,740	688,379
Significant Other Observable Inputs (Level 2) | Mortgage-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	490,139	688,298
Significant Other Observable Inputs (Level 2) | Corporate obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	40,851	36,810
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	15,148	20,166
Loans held for sale	0	0
Derivative Assets	0
Derivative Liabilities	0
Significant Unobservable Inputs (Level 3) | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0
Derivative Liabilities	0
Significant Unobservable Inputs (Level 3) | U.S Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Significant Unobservable Inputs (Level 3) | Obligations of U.S. government agencies and sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Significant Unobservable Inputs (Level 3) | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	15,117	20,123
Significant Unobservable Inputs (Level 3) | Mortgage-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	0	0
Significant Unobservable Inputs (Level 3) | Corporate obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investment securities available-for-sale	$ 31	$ 43