FAIR VALUE MEASUREMENTS - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	$ 6,100	$ 6,700
Fair Value	1,022,285	1,423,200
Marketable equity securities	13,029	12,856
Capitalized servicing rights	16,600	16,700
U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	7,981	11,973
Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	63,853	63,335
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	39,115	40,510
Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	656	656
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Fair Value	1,022,285	1,423,200
Marketable equity securities	13,029	12,856
Loans held for investment	8,768,108	8,194,110
Loans held for sale	2,237	4,311
Derivative assets	45,668	54,241
Derivative liabilities	75,957	97,030
Recurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Marketable equity securities	13,029	12,856
Loans held for investment	374	605
Loans held for sale	2,237	942
Derivative assets	45,668	54,241
Capitalized servicing rights	1,526	1,846
Derivative liabilities	75,957	97,030
Recurring | Fair Value | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	7,981	11,973
Recurring | Fair Value | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	63,853	63,335
Recurring | Fair Value | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	347,874	531,945
Recurring | Fair Value | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	417,480	546,313
Recurring | Fair Value | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	145,326	228,468
Recurring | Fair Value | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	39,115	40,510
Recurring | Fair Value | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	656	656
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Fair Value	7,981	11,973
Marketable equity securities	13,029	12,856
Loans held for investment	0	0
Loans held for sale	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Marketable equity securities	13,029	12,856
Loans held for investment	0	0
Loans held for sale	0	0
Derivative assets	0	0
Capitalized servicing rights	0	0
Derivative liabilities	0	0
Level 1 | Recurring | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	7,981	11,973
Level 1 | Recurring | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Fair Value	1,010,381	1,407,227
Marketable equity securities	0	0
Loans held for investment	0	0
Loans held for sale	2,237	942
Derivative assets	45,613	54,216
Derivative liabilities	75,957	97,030
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Marketable equity securities	0	0
Loans held for investment	0	0
Loans held for sale	2,237	942
Derivative assets	45,613	54,216
Capitalized servicing rights	0	0
Derivative liabilities	75,957	97,030
Level 2 | Recurring | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 2 | Recurring | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	63,853	63,335
Level 2 | Recurring | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	347,874	531,945
Level 2 | Recurring | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	417,480	546,313
Level 2 | Recurring | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	145,326	228,468
Level 2 | Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	35,192	36,510
Level 2 | Recurring | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	656	656
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Fair Value	3,923	4,000
Marketable equity securities	0	0
Loans held for investment	8,768,108	8,194,110
Loans held for sale	0	3,369
Derivative assets	55	25
Derivative liabilities	0	0
Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Marketable equity securities	0	0
Loans held for investment	374	605
Loans held for sale	0	0
Derivative assets	55	25
Capitalized servicing rights	1,526	1,846
Derivative liabilities	0	0
Level 3 | Recurring | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	3,923	4,000
Level 3 | Recurring | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0