FAIR VALUE MEASURES - Schedule of Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financial assets:
Cash and due from banks	$ 244,980	$ 230,470
Interest-bearing deposits in banks	975,397	936,834
Debt securities held-to-maturity	144,028	122,731
Financial liabilities:
Other borrowings	291,788	509,586
Subordinated deferrable interest debentures	132,309	130,315
Carrying Amount
Financial assets:
Cash and due from banks	244,980	230,470
Interest-bearing deposits in banks	975,397	936,834
Debt securities held-to-maturity	164,677	141,512
Loans, net	20,356,125	19,925,225
Financial liabilities:
Deposits	21,722,448	20,708,509
Other borrowings	291,788	509,586
Subordinated deferrable interest debentures	132,309	130,315
Fair Value
Financial assets:
Cash and due from banks	244,980	230,470
Interest-bearing deposits in banks	975,397	936,834
Debt securities held-to-maturity	144,028	122,731
Loans, net	19,882,553	19,332,899
Financial liabilities:
Deposits	21,721,421	20,707,463
Other borrowings	291,213	501,723
Subordinated deferrable interest debentures	142,202	141,407
Fair Value | Level 1
Financial assets:
Cash and due from banks	244,980	230,470
Interest-bearing deposits in banks	975,397	936,834
Debt securities held-to-maturity	0	0
Loans, net	0	0
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
Subordinated deferrable interest debentures	0	0
Fair Value | Level 2
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits in banks	0	0
Debt securities held-to-maturity	144,028	122,731
Loans, net	0	0
Financial liabilities:
Deposits	21,721,421	20,707,463
Other borrowings	291,213	501,723
Subordinated deferrable interest debentures	142,202	141,407
Fair Value | Level 3
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits in banks	0	0
Debt securities held-to-maturity	0
Loans, net	19,882,553	19,332,899
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
Subordinated deferrable interest debentures	$ 0	$ 0