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Securities Available for sale, Unrealized Loss Position, Fair Value (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 1,123 | 1,153
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 1,205,822 | $ 6,173,710
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 8,087,455 | 3,829,168
Available for sale securities, Unrealized Loss Position, Fair Value | 9,293,277 | 10,002,878
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 7,969 | 376,598
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 661,476 | 517,616
Available for sale securities, Unrealized Loss Position, Accumulated Loss | 669,445 | $ 894,214
Debt Securities, Available-for-sale, Allowance for Credit Loss | $ 0 |
U.S. Treasury [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 1 | 1
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 0 | $ 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 925 | 899
Available for sale securities, Unrealized Loss Position, Fair Value | 925 | 899
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 75 | 102
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 75 | $ 102
Municipal securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 190 | 227
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 6,799 | $ 146,634
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 494,955 | 428,248
Available for sale securities, Unrealized Loss Position, Fair Value | 501,754 | 574,882
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 410 | 5,301
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 41,465 | 58,395
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 41,875 | $ 63,696
Residential agency mortgage-backed securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 630 | 613
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 690,118 | $ 3,879,582
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 3,717,975 | 863,732
Available for sale securities, Unrealized Loss Position, Fair Value | 4,408,093 | 4,743,314
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 3,689 | 256,973
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 265,219 | 102,974
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 268,908 | $ 359,947
Residential non-agency mortgage-backed securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 32 | 26
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 116,077 | $ 499,716
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 451,370 | 0
Available for sale securities, Unrealized Loss Position, Fair Value | 567,447 | 499,716
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 1,244 | 50,623
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 45,279 | 0
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 46,523 | $ 50,623
Commercial agency mortgage-backed securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 269 | 285
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 392,828 | $ 1,647,778
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 3,421,757 | 2,535,816
Available for sale securities, Unrealized Loss Position, Fair Value | 3,814,585 | 4,183,594
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 2,626 | 63,701
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 309,411 | 356,118
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 312,037 | $ 419,819
Other debt securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 1 | 1
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 0 | $ 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 473 | 473
Available for sale securities, Unrealized Loss Position, Fair Value | 473 | 473
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 27 | 27
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 27 | $ 27

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