FAIR VALUE OF FINANCIAL INSTRUMENTS - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financial Assets
Derivative Asset	$ 134,489	$ 122,132
Financial Liabilities
Derivative Liability	122,567	121,265
Fair Value, Recurring [Member] | Fair Value Hedging [Member]
Financial Liabilities
Derivative Liability	400	6,594
Fair Value, Recurring [Member] | Cash Flow Hedging [Member]
Financial Assets
Derivative Asset	12,134	12,492
Financial Liabilities
Derivative Liability	701	5,031
Fair Value, Recurring [Member] | Freestanding derivatives, net
Financial Assets
Derivative Asset	122,401	114,671
Financial Liabilities
Derivative Liability	122,401	114,671
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value Hedging [Member]
Financial Liabilities
Derivative Liability	400	6,594
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Flow Hedging [Member]
Financial Assets
Derivative Asset	12,134	12,492
Financial Liabilities
Derivative Liability	701	5,031
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Freestanding derivatives, net
Financial Assets
Derivative Asset	122,401	114,671
Financial Liabilities
Derivative Liability	122,401	114,671
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Certain individually evaluated loans
Individually evaluated loans	823	6,336
Reported Value Measurement [Member]
Certain individually evaluated loans
Individually evaluated loans	10,746,223	10,695,349
Reported Value Measurement [Member] | Fair Value, Nonrecurring [Member]
Certain individually evaluated loans
Individually evaluated loans	823	6,336
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member]
Financial Assets
Securities available-for-sale:	9,432	9,371
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets
Securities available-for-sale:	9,432	9,371
US Treasury Securities [Member] | Fair Value, Recurring [Member]
Financial Assets
Securities available-for-sale:	197,912	234,190
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets
Securities available-for-sale:	197,912	234,190
Corporate securities | Fair Value, Recurring [Member]
Financial Assets
Securities available-for-sale:	155,410	151,170
Corporate securities | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets
Securities available-for-sale:	155,410	151,170
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Recurring [Member]
Financial Assets
Mortgage-backed securities	187,044	205,285
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets
Mortgage-backed securities	187,044	205,285
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member]
Financial Assets
Securities available-for-sale:	243,846	259,415
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets
Securities available-for-sale:	243,846	259,415
Debt Security, Corporate, US [Member] | Fair Value, Recurring [Member]
Financial Assets
Securities available-for-sale:	25,578	26,809
Debt Security, Corporate, US [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets
Securities available-for-sale:	$ 25,578	$ 26,809