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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
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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)

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