SECURITIES - Held-to-maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities held-to-maturity:
Amortized Cost	$ 592,414	$ 594,639
Gross Unrecognized Gains	367	16
Gross Unrecognized Losses	(64,251)	(77,725)
Fair Value	528,530	516,930
Agency notes
Securities held-to-maturity:
Amortized Cost	89,873	89,563
Gross Unrecognized Losses	(8,355)	(11,300)
Fair Value	81,518	78,263
Corporate securities
Securities held-to-maturity:
Amortized Cost	13,000	9,000
Gross Unrecognized Gains	80
Gross Unrecognized Losses	(975)	(1,825)
Fair Value	12,105	7,175
Pass-through MBS issued by GSEs
Securities held-to-maturity:
Amortized Cost	266,043	279,853
Gross Unrecognized Gains	136
Gross Unrecognized Losses	(31,803)	(37,579)
Fair Value	234,376	242,274
Agency CMOs
Securities held-to-maturity:
Amortized Cost	223,498	216,223
Gross Unrecognized Gains	151	16
Gross Unrecognized Losses	(23,118)	(27,021)
Fair Value	$ 200,531	$ 189,218