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Securities - Estimated Fair Value and Unrealized Loss for Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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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 | $ 444,596 | $ 21,795
Available-for-sale, Less than 12 months, Unrealized Losses | (2,894) | (6)
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 | 444,596 | 21,795
Available-for-sale, Total, Unrealized Losses | (2,894) | (6)
Held-to-maturity, Less than 12 months, Estimated Fair Value | 572,009 | 86,523
Held-to-maturity, Less than 12 months, Unrealized Losses | (8,309) | (546)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 55,402 | 46,965
Held-to-maturity, 12 months or longer, Unrealized Losses | (1,462) | (2,680)
Held-to-maturity, Total, Estimated Fair Value | 627,411 | 133,488
Held-to-maturity, total, unrealized losses | (9,771) | (3,226)
Total securities, Less than 12 months, Estimated Fair Value | 1,016,605 | 108,318
Total securities, Less than 12 months, Unrealized Losses | (11,203) | (552)
Total securities, 12 months or longer, Estimated Fair Value | 55,402 | 46,965
Total securities, 12 months or longer, Unrealized Losses | (1,462) | (2,680)
Total securities, Estimated Fair Value | 1,072,007 | 155,283
Total securities, Unrealized Losses | (12,665) | (3,232)
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 | 82,395 | 17,029
Available-for-sale, Less than 12 months, Unrealized Losses | (471) | (2)
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 | 82,395 | 17,029
Available-for-sale, Total, Unrealized Losses | (471) | (2)
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 | 75,329 | 2,823
Held-to-maturity, Less than 12 months, Unrealized Losses | (1,063) | (23)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 4,383 | 7,509
Held-to-maturity, 12 months or longer, Unrealized Losses | (101) | (208)
Held-to-maturity, Total, Estimated Fair Value | 79,712 | 10,332
Held-to-maturity, total, unrealized losses | (1,164) | (231)
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 | 1,989 |
Available-for-sale, Less than 12 months, Unrealized Losses | (11) |
Available-for-sale, 12 months or Longer, Estimated Fair Value | 0 |
Available-for-sale, 12 months or longer, Unrealized Losses | 0 |
Available-for-sale, Total, Estimated Fair Value | 1,989 |
Available-for-sale, Total, Unrealized Losses | (11) |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 38,304 | 10,192
Held-to-maturity, Less than 12 months, Unrealized Losses | (1,279) | (255)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 0 | 35,935
Held-to-maturity, 12 months or longer, Unrealized Losses | 0 | (2,397)
Held-to-maturity, Total, Estimated Fair Value | 38,304 | 46,127
Held-to-maturity, total, unrealized losses | (1,279) | (2,652)
Asset-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 | 279,486 | 4,766
Available-for-sale, Less than 12 months, Unrealized Losses | (1,489) | (4)
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 | 279,486 | 4,766
Available-for-sale, Total, Unrealized Losses | (1,489) | (4)
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 | 458,376 | 73,508
Held-to-maturity, Less than 12 months, Unrealized Losses | (5,967) | (268)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 51,019 | 3,521
Held-to-maturity, 12 months or longer, Unrealized Losses | (1,361) | (75)
Held-to-maturity, Total, Estimated Fair Value | 509,395 | 77,029
Held-to-maturity, total, unrealized losses | (7,328) | (343)
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 | 80,726 |
Available-for-sale, Less than 12 months, Unrealized Losses | (923) |
Available-for-sale, 12 months or Longer, Estimated Fair Value | 0 |
Available-for-sale, 12 months or longer, Unrealized Losses | 0 |
Available-for-sale, Total, Estimated Fair Value | 80,726 |
Available-for-sale, Total, Unrealized Losses | (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 | 445,399 | 69,882
Held-to-maturity, Less than 12 months, Unrealized Losses | (5,822) | (256)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 50,133 | 1,815
Held-to-maturity, 12 months or longer, Unrealized Losses | (1,358) | (27)
Held-to-maturity, Total, Estimated Fair Value | 495,532 | 71,697
Held-to-maturity, total, unrealized losses | (7,180) | (283)
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 | 2,255 | 3,626
Held-to-maturity, Less than 12 months, Unrealized Losses | (41) | (12)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 886 | 1,706
Held-to-maturity, 12 months or longer, Unrealized Losses | (3) | (48)
Held-to-maturity, Total, Estimated Fair Value | 3,141 | 5,332
Held-to-maturity, total, unrealized losses | (44) | (60)
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 | 10,722 |
Held-to-maturity, Less than 12 months, Unrealized Losses | (104) |
Held-to-maturity, 12 months or longer, Estimated Fair Value | 0 |
Held-to-maturity, 12 months or longer, Unrealized Losses | 0 |
Held-to-maturity, Total, Estimated Fair Value | 10,722 |
Held-to-maturity, total, unrealized losses | $ (104) | $ 0

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