FAIR VALUE OF FINANCIAL INSTRUMENTS - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financial Assets
Derivative assets	$ 116,496	$ 122,132
Financial Liabilities
Derivative liabilities	108,347	121,265
Recurring | Fair value hedges
Financial Liabilities
Derivative liabilities		6,594
Recurring | Cash flow hedges
Financial Assets
Derivative assets	8,318	7,461
Financial Liabilities
Derivative liabilities	159	5,031
Recurring | Freestanding derivatives, net
Financial Assets
Derivative assets	108,178	114,671
Financial Liabilities
Derivative liabilities	108,178	114,671
Recurring | Risk participations
Financial Liabilities
Derivative liabilities	10
Recurring | Level 2 | Fair value hedges
Financial Liabilities
Derivative liabilities		6,594
Recurring | Level 2 | Cash flow hedges
Financial Assets
Derivative assets	8,318	7,461
Financial Liabilities
Derivative liabilities	159	5,031
Recurring | Level 2 | Freestanding derivatives, net
Financial Assets
Derivative assets	108,178	114,671
Financial Liabilities
Derivative liabilities	108,178	114,671
Recurring | Level 2 | Risk participations
Financial Liabilities
Derivative liabilities	10
Agency notes | Recurring
Financial Assets
Securities available-for-sale:	9,607	9,371
Agency notes | Recurring | Level 2
Financial Assets
Securities available-for-sale:	9,607	9,371
Treasury securities | Recurring
Financial Assets
Securities available-for-sale:		234,190
Treasury securities | Recurring | Level 2
Financial Assets
Securities available-for-sale:		234,190
Corporate securities | Recurring
Financial Assets
Securities available-for-sale:	163,949	151,170
Corporate securities | Recurring | Level 2
Financial Assets
Securities available-for-sale:	163,949	151,170
Pass-through MBS issued by GSEs | Recurring
Financial Assets
Securities available-for-sale:		205,285
Mortgage-backed securities	300,221
Pass-through MBS issued by GSEs | Recurring | Level 2
Financial Assets
Securities available-for-sale:		205,285
Mortgage-backed securities	300,221
Agency CMOs | Recurring
Financial Assets
Securities available-for-sale:	191,888
Marketable equity securities (Registered Mutual Funds)		259,415
Agency CMOs | Recurring | Level 2
Financial Assets
Securities available-for-sale:	191,888
Marketable equity securities (Registered Mutual Funds)		259,415
State and municipal obligations | Recurring
Financial Assets
Securities available-for-sale:	25,028	26,809
State and municipal obligations | Recurring | Level 2
Financial Assets
Securities available-for-sale:	$ 25,028	$ 26,809