Securities - Schedule of Estimated Fair Value and Unrealized Losses for Debt Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Available-for-sale, Less than 12 months, Estimated Fair Value	$ 40,027	$ 171,376
Available-for-sale, Less than 12 months, Unrealized Losses	(60)	(264)
Available-for-sale, 12 months or Longer, Estimated Fair Value	371,918	451,856
Available-for-sale, 12 months or longer, Unrealized Losses	(24,978)	(26,117)
Available-for-sale, Total, Estimated Fair Value	411,945	623,232
Available-for-sale, Total, Unrealized Losses	(25,038)	(26,381)
Held-to-maturity, Less than 12 months, Estimated Fair Value	129,702	124,433
Held-to-maturity, Less than 12 months, Unrealized Losses	(2,740)	(1,559)
Held-to-maturity, 12 months or longer, Estimated Fair Value	849,435	849,609
Held-to-maturity, 12 months or longer, Unrealized Losses	(97,579)	(92,424)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1	979,137	974,042
Held-to-maturity, total, unrealized losses	(100,319)	(93,983)
Total securities, Less than 12 months, Estimated Fair Value	169,729	295,809
Total securities, Less than 12 months, Unrealized Losses	(2,800)	(1,823)
Total securities, 12 months or longer, Estimated Fair Value	1,221,353	1,301,465
Total securities, 12 months or longer, Unrealized Losses	(122,557)	(118,541)
Total securities, Estimated Fair Value	1,391,082	1,597,274
Total securities, Unrealized Losses	(125,357)	(120,364)
Mortgage-backed securities:
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Available-for-sale, Less than 12 months, Estimated Fair Value	23,921	169,000
Available-for-sale, Less than 12 months, Unrealized Losses	(12)	(97)
Available-for-sale, 12 months or Longer, Estimated Fair Value	93,289	94,335
Available-for-sale, 12 months or longer, Unrealized Losses	(16,063)	(15,255)
Available-for-sale, Total, Estimated Fair Value	117,210	263,335
Available-for-sale, Total, Unrealized Losses	(16,075)	(15,352)
Held-to-maturity, Less than 12 months, Estimated Fair Value	124,031	114,678
Held-to-maturity, Less than 12 months, Unrealized Losses	(2,142)	(1,063)
Held-to-maturity, 12 months or longer, Estimated Fair Value	606,389	599,712
Held-to-maturity, 12 months or longer, Unrealized Losses	(79,099)	(74,429)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1	730,420	714,390
Held-to-maturity, total, unrealized losses	(81,241)	(75,492)
U.S. government and agency obligations | Investment securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Available-for-sale, Less than 12 months, Estimated Fair Value	5,383	833
Available-for-sale, Less than 12 months, Unrealized Losses	(14)	(2)
Available-for-sale, 12 months or Longer, Estimated Fair Value	54,269	59,861
Available-for-sale, 12 months or longer, Unrealized Losses	(6,152)	(5,794)
Available-for-sale, Total, Estimated Fair Value	59,652	60,694
Available-for-sale, Total, Unrealized Losses	(6,166)	(5,796)
Corporate debt securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, total, unrealized losses	(3,543)	(3,941)
Corporate debt securities | Investment securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Available-for-sale, Less than 12 months, Estimated Fair Value	1,432	1,543
Available-for-sale, Less than 12 months, Unrealized Losses	(25)	(165)
Available-for-sale, 12 months or Longer, Estimated Fair Value	7,496	6,116
Available-for-sale, 12 months or longer, Unrealized Losses	(1,153)	(816)
Available-for-sale, Total, Estimated Fair Value	8,928	7,659
Available-for-sale, Total, Unrealized Losses	(1,178)	(981)
Held-to-maturity, Less than 12 months, Estimated Fair Value	2,996	3,084
Held-to-maturity, Less than 12 months, Unrealized Losses	(568)	(473)
Held-to-maturity, 12 months or longer, Estimated Fair Value	57,739	58,386
Held-to-maturity, 12 months or longer, Unrealized Losses	(2,975)	(3,468)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1	60,735	61,470
Held-to-maturity, total, unrealized losses	(3,543)	(3,941)
Asset-backed securities | Investment securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Available-for-sale, Less than 12 months, Estimated Fair Value	9,291	0
Available-for-sale, Less than 12 months, Unrealized Losses	(9)	0
Available-for-sale, 12 months or Longer, Estimated Fair Value	216,864	291,544
Available-for-sale, 12 months or longer, Unrealized Losses	(1,610)	(4,252)
Available-for-sale, Total, Estimated Fair Value	226,155	291,544
Available-for-sale, Total, Unrealized Losses	(1,619)	(4,252)
Agency residential
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, total, unrealized losses	(75,407)	(70,040)
Agency residential | Mortgage-backed securities:
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Available-for-sale, Less than 12 months, Estimated Fair Value	23,921	169,000
Available-for-sale, Less than 12 months, Unrealized Losses	(12)	(97)
Available-for-sale, 12 months or Longer, Estimated Fair Value	0	0
Available-for-sale, 12 months or longer, Unrealized Losses	0	0
Available-for-sale, Total, Estimated Fair Value	23,921	169,000
Available-for-sale, Total, Unrealized Losses	(12)	(97)
Held-to-maturity, Less than 12 months, Estimated Fair Value	104,295	95,776
Held-to-maturity, Less than 12 months, Unrealized Losses	(1,702)	(693)
Held-to-maturity, 12 months or longer, Estimated Fair Value	530,150	525,751
Held-to-maturity, 12 months or longer, Unrealized Losses	(73,705)	(69,347)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1	634,445	621,527
Held-to-maturity, total, unrealized losses	(75,407)	(70,040)
Agency commercial
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, total, unrealized losses	(4,312)	(3,678)
Agency commercial | Mortgage-backed securities:
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Available-for-sale, Less than 12 months, Estimated Fair Value	0	0
Available-for-sale, Less than 12 months, Unrealized Losses	0	0
Available-for-sale, 12 months or Longer, Estimated Fair Value	93,289	94,335
Available-for-sale, 12 months or longer, Unrealized Losses	(16,063)	(15,255)
Available-for-sale, Total, Estimated Fair Value	93,289	94,335
Available-for-sale, Total, Unrealized Losses	(16,063)	(15,255)
Held-to-maturity, Less than 12 months, Estimated Fair Value	19,736	18,902
Held-to-maturity, Less than 12 months, Unrealized Losses	(440)	(370)
Held-to-maturity, 12 months or longer, Estimated Fair Value	57,153	55,051
Held-to-maturity, 12 months or longer, Unrealized Losses	(3,872)	(3,308)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1	76,889	73,953
Held-to-maturity, total, unrealized losses	(4,312)	(3,678)
Non-agency commercial
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, total, unrealized losses	(1,522)	(1,774)
Non-agency commercial | Mortgage-backed securities:
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	0	0
Held-to-maturity, Less than 12 months, Unrealized Losses	0	0
Held-to-maturity, 12 months or longer, Estimated Fair Value	19,086	18,910
Held-to-maturity, 12 months or longer, Unrealized Losses	(1,522)	(1,774)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1	19,086	18,910
Held-to-maturity, total, unrealized losses	(1,522)	(1,774)
State, municipal, and sovereign debt obligations
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, total, unrealized losses	(15,535)	(14,550)
State, municipal, and sovereign debt obligations | Investment securities
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items]
Held-to-maturity, Less than 12 months, Estimated Fair Value	2,675	6,671
Held-to-maturity, Less than 12 months, Unrealized Losses	(30)	(23)
Held-to-maturity, 12 months or longer, Estimated Fair Value	185,307	191,511
Held-to-maturity, 12 months or longer, Unrealized Losses	(15,505)	(14,527)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1	187,982	198,182
Held-to-maturity, total, unrealized losses	$ (15,535)	$ (14,550)