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Securities - Estimated Fair Value and Unrealized Loss for Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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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 | $ 373,764 | $ 444,596
Available-for-sale, Less than 12 months, Unrealized Losses | (39,311) | (2,894)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 96,537 | 0
Available-for-sale, 12 months or longer, Unrealized Losses | (9,686) | 0
Available-for-sale, Total, Estimated Fair Value | 470,301 | 444,596
Available-for-sale, Total, Unrealized Losses | (48,997) | (2,894)
Held-to-maturity, Less than 12 months, Estimated Fair Value | 463,077 | 572,009
Held-to-maturity, Less than 12 months, Unrealized Losses | (51,935) | (8,309)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 420,336 | 55,402
Held-to-maturity, 12 months or longer, Unrealized Losses | (74,534) | (1,462)
Held-to-maturity, Total, Estimated Fair Value | 883,413 | 627,411
Held-to-maturity, total, unrealized losses | (126,469) | (9,771)
Total securities, Less than 12 months, Estimated Fair Value | 836,841 | 1,016,605
Total securities, Less than 12 months, Unrealized Losses | (91,246) | (11,203)
Total securities, 12 months or longer, Estimated Fair Value | 516,873 | 55,402
Total securities, 12 months or longer, Unrealized Losses | (84,220) | (1,462)
Total securities, Estimated Fair Value | 1,353,714 | 1,072,007
Total securities, Unrealized Losses | (175,466) | (12,665)
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 | 75,464 | 82,395
Available-for-sale, Less than 12 months, Unrealized Losses | (5,924) | (471)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 23,635 | 0
Available-for-sale, 12 months or longer, Unrealized Losses | (2,175) | 0
Available-for-sale, Total, Estimated Fair Value | 99,099 | 82,395
Available-for-sale, Total, Unrealized Losses | (8,099) | (471)
Corporate debt securities |  |
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items] |  |
Held-to-maturity, total, unrealized losses | (3,135) | (1,279)
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 | 3,496 | 1,989
Available-for-sale, Less than 12 months, Unrealized Losses | (504) | (11)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 877 | 0
Available-for-sale, 12 months or longer, Unrealized Losses | (124) | 0
Available-for-sale, Total, Estimated Fair Value | 4,373 | 1,989
Available-for-sale, Total, Unrealized Losses | (628) | (11)
Held-to-maturity, Less than 12 months, Estimated Fair Value | 14,142 | 38,304
Held-to-maturity, Less than 12 months, Unrealized Losses | (319) | (1,279)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 36,516 | 0
Held-to-maturity, 12 months or longer, Unrealized Losses | (2,816) | 0
Held-to-maturity, Total, Estimated Fair Value | 50,658 | 38,304
Held-to-maturity, total, unrealized losses | (3,135) | (1,279)
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 | 216,926 | 279,486
Available-for-sale, Less than 12 months, Unrealized Losses | (16,650) | (1,489)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 57,947 | 0
Available-for-sale, 12 months or longer, Unrealized Losses | (4,705) | 0
Available-for-sale, Total, Estimated Fair Value | 274,873 | 279,486
Available-for-sale, Total, Unrealized Losses | (21,355) | (1,489)
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 | 276,845 | 458,376
Held-to-maturity, Less than 12 months, Unrealized Losses | (29,156) | (5,967)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 325,171 | 51,019
Held-to-maturity, 12 months or longer, Unrealized Losses | (63,126) | (1,361)
Held-to-maturity, Total, Estimated Fair Value | 602,016 | 509,395
Held-to-maturity, total, unrealized losses | (92,282) | (7,328)
Mortgage-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 | 77,878 | 80,726
Available-for-sale, Less than 12 months, Unrealized Losses | (16,233) | (923)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 14,078 | 0
Available-for-sale, 12 months or longer, Unrealized Losses | (2,682) | 0
Available-for-sale, Total, Estimated Fair Value | 91,956 | 80,726
Available-for-sale, Total, Unrealized Losses | (18,915) | (923)
Mortgage-backed securities: | Agency residential |  |
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items] |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 252,724 | 445,399
Held-to-maturity, Less than 12 months, Unrealized Losses | (26,933) | (5,822)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 318,925 | 50,133
Held-to-maturity, 12 months or longer, Unrealized Losses | (62,763) | (1,358)
Held-to-maturity, Total, Estimated Fair Value | 571,649 | 495,532
Held-to-maturity, total, unrealized losses | (89,696) | (7,180)
Mortgage-backed securities: | Agency commercial |  |
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items] |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 3,609 | 2,255
Held-to-maturity, Less than 12 months, Unrealized Losses | (242) | (41)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 2,092 | 886
Held-to-maturity, 12 months or longer, Unrealized Losses | (37) | (3)
Held-to-maturity, Total, Estimated Fair Value | 5,701 | 3,141
Held-to-maturity, total, unrealized losses | (279) | (44)
Mortgage-backed securities: | Non-agency commercial |  |
Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items] |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 20,512 | 10,722
Held-to-maturity, Less than 12 months, Unrealized Losses | (1,981) | (104)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 4,154 | 0
Held-to-maturity, 12 months or longer, Unrealized Losses | (326) | 0
Held-to-maturity, Total, Estimated Fair Value | 24,666 | 10,722
Held-to-maturity, total, unrealized losses | (2,307) | (104)
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 | (31,052) | (1,164)
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 | 172,090 | 75,329
Held-to-maturity, Less than 12 months, Unrealized Losses | (22,460) | (1,063)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 58,649 | 4,383
Held-to-maturity, 12 months or longer, Unrealized Losses | (8,592) | (101)
Held-to-maturity, Total, Estimated Fair Value | 230,739 | 79,712
Held-to-maturity, total, unrealized losses | $ (31,052) | $ (1,164)

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