Available for Sale Debt Securities - Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 2,975,695	$ 1,901,798
Gross unrealized gains	11,606	2,159
Gross unrealized losses	(218,386)	(213,845)
Fair value	2,768,915	1,690,112
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	348,621	276,618
Gross unrealized gains	317	0
Gross unrealized losses	(18,340)	(22,740)
Fair value	330,598	253,878
Government-agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	105,965	26,310
Gross unrealized gains	1,461	1,188
Gross unrealized losses	(191)	0
Fair value	107,235	27,498
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	2,243,725	1,462,159
Gross unrealized gains	4,982	377
Gross unrealized losses	(186,548)	(176,927)
Fair value	2,062,159	1,285,609
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	47,203	31,809
Gross unrealized gains	645	594
Gross unrealized losses	(285)	(168)
Fair value	47,563	32,235
State and municipal obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	126,766	64,454
Gross unrealized gains	243	0
Gross unrealized losses	(10,092)	(7,870)
Fair value	116,917	56,584
Corporate obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	103,415	40,448
Gross unrealized gains	3,958	0
Gross unrealized losses	(2,930)	(6,140)
Fair value	$ 104,443	$ 34,308

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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