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Investment Securities - Schedule of Amortized, Gross Unrealized Gains and Losses, and Fair Value on Investment Securities, Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Investment securities available for sale:
Amortized Cost	$ 835,592	$ 1,227,787
Gross Unrealized Gains	1,085	2,786
Gross Unrealized Losses	(72,283)	(96,220)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively)	764,394	1,134,353
Investment securities held to maturity:
Amortized Cost	(703,285)	(739,442)
Gross Unrecognized Gains	27	0
Gross Unrecognized Losses	(79,860)	(76,992)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively)	623,452	662,450
US Treasury and Government [Member]
Investment securities available for sale:
Amortized Cost	14,934	16,047
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,390)	(2,297)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively)	12,544	13,750
Investment securities held to maturity:
Amortized Cost	(151,216)	(151,075)
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	(28,874)	(27,701)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively)	122,342	123,374
Municipal securities
Investment securities available for sale:
Amortized Cost	61,169	92,231
Gross Unrealized Gains	12	9
Gross Unrealized Losses	(10,239)	(12,715)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively)	50,942	79,525
Residential CMO and MBS
Investment securities available for sale:
Amortized Cost	407,520	555,518
Gross Unrealized Gains	711	2,656
Gross Unrealized Losses	(38,900)	(46,125)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively)	369,331	512,049
Investment securities held to maturity:
Amortized Cost	(244,309)	(267,204)
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	(18,563)	(14,101)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively)	225,746	253,103
Commercial CMO and MBS
Investment securities available for sale:
Amortized Cost	330,249	538,910
Gross Unrealized Gains	134	88
Gross Unrealized Losses	(20,642)	(34,740)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively)	309,741	504,258
Investment securities held to maturity:
Amortized Cost	(307,760)	(321,163)
Gross Unrecognized Gains	27	0
Gross Unrecognized Losses	(32,423)	(35,190)
Investment securities held to maturity, at amortized cost, net (fair value of $623,452 and $662,450, respectively)	275,364	285,973
Corporate obligations
Investment securities available for sale:
Amortized Cost	11,700	7,745
Gross Unrealized Gains	181	2
Gross Unrealized Losses	(111)	(134)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively)	11,770	7,613
Other asset-backed securities
Investment securities available for sale:
Amortized Cost	10,020	17,336
Gross Unrealized Gains	47	31
Gross Unrealized Losses	(1)	(209)
Investment securities available for sale, at fair value, net (amortized cost of $835,592 and $1,227,787, respectively)	$ 10,066	$ 17,158

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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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