FAIR VALUE OF FINANCIAL INSTRUMENTS - Financial Instruments Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financial Assets
Securities held-to-maturity	$ 552,277	$ 516,930
Loans held for sale	22,625	10,159
Reported value measurement
Financial Assets
Cash and due from banks	1,283,571	457,547
Securities held-to-maturity	637,339	594,639
Loans held for sale	22,625	10,159
Loans held for investment, net	10,775,608	10,695,349
Accrued interest receivable	55,970	55,666
Financial Liabilities
Savings, money market and checking accounts	10,617,060	8,922,972
CDs	1,069,081	1,607,683
FHLBNY Advances	608,000	1,313,000
Subordinated debt, net	272,325	200,196
Other short-term borrowings	50,000
Accrued interest payable	8,586	17,298
Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	1,283,571	457,547
Securities held-to-maturity	552,277	516,930
Loans held for sale	22,625	10,159
Loans held for investment, net	10,354,366	10,305,026
Accrued interest receivable	55,970	55,666
Financial Liabilities
Savings, money market and checking accounts	10,617,060	8,922,972
CDs	1,066,630	1,602,087
FHLBNY Advances	608,908	1,312,940
Subordinated debt, net	257,464	160,696
Other short-term borrowings	50,000
Accrued interest payable	8,586	17,298
Level 1 | Estimate of Fair Value Measurement
Financial Assets
Cash and due from banks	1,283,571	457,547
Financial Liabilities
Savings, money market and checking accounts	10,617,060	8,922,972
Other short-term borrowings	50,000
Level 2 | Estimate of Fair Value Measurement
Financial Assets
Securities held-to-maturity	552,277	516,930
Accrued interest receivable	6,676	6,593
Financial Liabilities
CDs	1,066,630	1,602,087
FHLBNY Advances	608,908	1,312,940
Subordinated debt, net	257,464	160,696
Accrued interest payable	8,586	17,298
Level 3 | Estimate of Fair Value Measurement
Financial Assets
Loans held for sale	22,625	10,159
Loans held for investment, net	10,354,366	10,305,026
Accrued interest receivable	$ 49,294	$ 49,073