Securities - Schedule of Debt Securities, Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Securities Financing Transaction [Line Items]
Available-for-sale, amortized cost	$ 768,392	$ 780,079
Available-for-sale, gross unrealized gains	1,590	194
Available-for-sale, gross unrealized losses	(25,038)	(26,381)
Available-for-sale, fair value	744,944	753,892
Allowance for Securities Credit Losses	0	0
Held-to-maturity, amortized cost	1,129,724	1,160,868
Held-to-maturity, gross unrealized gains	560	1,553
Held-to-maturity, gross unrealized losses	(100,319)	(93,983)
Debt securities held-to-maturity	1,029,965	1,068,438
Allowance for Securities Credit Losses	(1,058)	(1,133)	$ (1,043)	$ (1,128)
Total, amortized cost	1,898,116	1,940,947
Total, gross unrealized gains	2,150	1,747
Total, gross unrealized losses	(125,357)	(120,364)
Total, estimated fair value	1,774,909	1,822,330
U.S. government and agency obligations
Securities Financing Transaction [Line Items]
Available-for-sale, amortized cost	65,818	66,490
Available-for-sale, gross unrealized gains	0	0
Available-for-sale, gross unrealized losses	(6,166)	(5,796)
Available-for-sale, fair value	59,652	60,694
Allowance for Securities Credit Losses	0	0
Corporate debt securities
Securities Financing Transaction [Line Items]
Available-for-sale, amortized cost	11,831	10,096
Available-for-sale, gross unrealized gains	17	11
Available-for-sale, gross unrealized losses	(1,178)	(981)
Available-for-sale, fair value	10,670	9,126
Allowance for Securities Credit Losses	0	0
Held-to-maturity, amortized cost	66,583	69,809
Held-to-maturity, gross unrealized gains	192	391
Held-to-maturity, gross unrealized losses	(3,543)	(3,941)
Debt securities held-to-maturity	63,232	66,259
Allowance for Securities Credit Losses	(916)	(987)
Asset-backed securities
Securities Financing Transaction [Line Items]
Available-for-sale, amortized cost	289,632	295,796
Available-for-sale, gross unrealized gains	113	0
Available-for-sale, gross unrealized losses	(1,619)	(4,252)
Available-for-sale, fair value	288,126	291,544
Allowance for Securities Credit Losses	0	0
Agency residential
Securities Financing Transaction [Line Items]
Available-for-sale, amortized cost	291,759	298,107
Available-for-sale, gross unrealized gains	1,460	183
Available-for-sale, gross unrealized losses	(12)	(97)
Available-for-sale, fair value	293,207	298,193
Allowance for Securities Credit Losses	0	0
Held-to-maturity, amortized cost	747,094	765,632
Held-to-maturity, gross unrealized gains	178	901
Held-to-maturity, gross unrealized losses	(75,407)	(70,040)
Debt securities held-to-maturity	671,865	696,493
Allowance for Securities Credit Losses	0	0
Agency commercial
Securities Financing Transaction [Line Items]
Available-for-sale, amortized cost	109,352	109,590
Available-for-sale, gross unrealized gains	0	0
Available-for-sale, gross unrealized losses	(16,063)	(15,255)
Available-for-sale, fair value	93,289	94,335
Allowance for Securities Credit Losses	0	0
Held-to-maturity, amortized cost	82,208	82,734
Held-to-maturity, gross unrealized gains	2	10
Held-to-maturity, gross unrealized losses	(4,312)	(3,678)
Debt securities held-to-maturity	77,898	79,066
Allowance for Securities Credit Losses	0	0
State, municipal, and sovereign debt obligations
Securities Financing Transaction [Line Items]
Held-to-maturity, amortized cost	213,231	222,009
Held-to-maturity, gross unrealized gains	188	251
Held-to-maturity, gross unrealized losses	(15,535)	(14,550)
Debt securities held-to-maturity	197,884	207,710
Allowance for Securities Credit Losses	(36)	(39)
Non-agency commercial
Securities Financing Transaction [Line Items]
Held-to-maturity, amortized cost	20,608	20,684
Held-to-maturity, gross unrealized gains	0	0
Held-to-maturity, gross unrealized losses	(1,522)	(1,774)
Debt securities held-to-maturity	19,086	18,910
Allowance for Securities Credit Losses	(106)	(107)
Total mortgage-backed securities
Securities Financing Transaction [Line Items]
Available-for-sale, amortized cost	401,111	407,697
Available-for-sale, gross unrealized gains	1,460	183
Available-for-sale, gross unrealized losses	(16,075)	(15,352)
Available-for-sale, fair value	386,496	392,528
Allowance for Securities Credit Losses	0	0
Held-to-maturity, amortized cost	849,910	869,050
Held-to-maturity, gross unrealized gains	180	911
Held-to-maturity, gross unrealized losses	(81,241)	(75,492)
Debt securities held-to-maturity	768,849	794,469
Allowance for Securities Credit Losses	$ (106)	$ (107)