SECURITIES - Available-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities available-for-sale:
Amortized Cost	$ 851,823	$ 995,709
Gross Unrealized Gains	695	56
Gross Unrealized Losses	(77,910)	(109,525)
Fair Value	774,608	886,240
Agency notes
Securities available-for-sale:
Amortized Cost	10,000	10,000
Gross Unrealized Losses	(311)	(629)
Fair Value	9,689	9,371
Treasury securities
Securities available-for-sale:
Amortized Cost	166,278	245,877
Gross Unrealized Losses	(4,907)	(11,687)
Fair Value	161,371	234,190
Corporate securities
Securities available-for-sale:
Amortized Cost	173,909	174,978
Gross Unrealized Gains	607
Gross Unrealized Losses	(13,887)	(23,808)
Fair Value	160,629	151,170
Pass-through MBS issued by GSEs
Securities available-for-sale:
Amortized Cost	197,805	230,253
Gross Unrealized Gains	26	10
Gross Unrealized Losses	(18,495)	(24,978)
Fair Value	179,336	205,285
Agency CMOs
Securities available-for-sale:
Amortized Cost	276,677	305,860
Gross Unrealized Gains	61	46
Gross Unrealized Losses	(38,965)	(46,491)
Fair Value	237,773	259,415
Debt Security, Corporate, US [Member]
Securities available-for-sale:
Amortized Cost	27,154	28,741
Gross Unrealized Gains	1
Gross Unrealized Losses	(1,345)	(1,932)
Fair Value	$ 25,810	$ 26,809

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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