Investment Securities - Schedule of Investment in AFS and HTM Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,161,644	$ 1,408,935
Gross Unrealized Gains	237	36
Gross Unrealized Losses	(88,469)	(141,545)
Allowance for Credit Losses	0	(22)
Estimated Fair Value	1,073,412	1,267,404
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	873,617	939,953
Gross Unrealized Gains	25	0
Gross Unrealized Losses	(86,980)	(119,571)
Estimated Fair Value	786,662	820,382
Less: allowance for credit losses	(1,199)	(1,306)
Total investment securities held-to-maturity	872,418	938,647
U.S. treasury bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		24,988
Gross Unrealized Gains		0
Gross Unrealized Losses		(212)
Allowance for Credit Losses		0
Estimated Fair Value		24,776
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	432,607	600,277
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(20,394)	(41,742)
Allowance for Credit Losses	0	0
Estimated Fair Value	412,213	558,535
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	644,193	719,815
Gross Unrealized Gains	108	36
Gross Unrealized Losses	(64,701)	(94,535)
Allowance for Credit Losses	0	0
Estimated Fair Value	579,600	625,316
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	558,842	605,904
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(62,442)	(85,941)
Estimated Fair Value	496,400	519,963
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	74,372	53,248
Gross Unrealized Gains	129	0
Gross Unrealized Losses	(2,783)	(4,303)
Allowance for Credit Losses	0	0
Estimated Fair Value	71,718	48,945
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	86,359	88,575
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(10,414)	(13,069)
Estimated Fair Value	75,945	75,506
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,472	8,607
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(532)	(593)
Allowance for Credit Losses	0	0
Estimated Fair Value	7,940	8,014
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	106,936	114,060
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(8,109)	(11,389)
Estimated Fair Value	98,827	102,671
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,000	2,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(59)	(160)
Allowance for Credit Losses	0	(22)
Estimated Fair Value	1,941	1,818
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	121,480	131,414
Gross Unrealized Gains	25	0
Gross Unrealized Losses	(6,015)	(9,172)
Estimated Fair Value	$ 115,490	$ 122,242

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