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Securities Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 3,080,658 | $ 1,156,119
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 2,268 | 33,052
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 337,980 | 1,122
Fair Value | 2,744,946 | 1,188,049
Allowance for credit losses - securities held-to-maturity | (1,608) | (161)
Securities held-to-maturity, net of allowance for credit losses | 3,079,050 | 1,155,958
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |  |
Due in one year or less | 1,994 |
Due in one year to five years | 427,894 |
Due in five to ten years | 133,681 |
Due after ten years | 1,919,729 |
Mortgage-backed securities | 413,119 |
Asset-backed securities | 184,241 |
Amortized cost | 3,080,658 | 1,156,119
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] |  |
Due in one year or less | 1,981 |
Due in one year to five years | 396,683 |
Due in five to ten years | 120,245 |
Due after ten years | 1,688,791 |
Mortgage-backed securities | 371,578 |
Asset-backed securities | 165,668 |
Fair Value | 2,744,946 | 1,188,049
Amortized Cost | 3,871,491 | 4,858,544
Gross Unrealized Gain | 12,805 | 88,336
Gross Unrealized Loss | 325,426 | 32,686
Securities available-for-sale, at fair value | 3,558,870 | 4,914,194
US Treasury Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 92,738 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 6,472 |
Fair Value | 86,266 |
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |  |
Amortized cost | 92,738 |
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] |  |
Fair Value | 86,266 |
Amortized Cost | 196,151 | 194,490
Gross Unrealized Gain | 0 | 0
Gross Unrealized Loss | 1,967 | 881
Securities available-for-sale, at fair value | 194,184 | 193,609
U.S. Government Agency Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 374,255 | 11,920
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 27,860 | 37
Fair Value | 346,395 | 11,883
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |  |
Amortized cost | 374,255 | 11,920
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] |  |
Fair Value | 346,395 | 11,883
Amortized Cost | 432,475 | 634,611
Gross Unrealized Gain | 0 | 2,359
Gross Unrealized Loss | 36,318 | 4,961
Securities available-for-sale, at fair value | 396,157 | 632,009
Mortgage-backed Agency Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 413,119 | 106,555
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 52 | 86
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 41,593 | 196
Fair Value | 371,578 | 106,445
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |  |
Amortized cost | 413,119 | 106,555
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] |  |
Fair Value | 371,578 | 106,445
Amortized Cost | 1,114,948 | 1,908,675
Gross Unrealized Gain | 211 | 29,874
Gross Unrealized Loss | 143,583 | 18,310
Securities available-for-sale, at fair value | 971,576 | 1,920,239
State and Municipal Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 1,927,778 | 1,037,644
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 2,216 | 32,966
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 233,564 | 889
Fair Value | 1,696,430 | 1,069,721
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |  |
Amortized cost | 1,927,778 | 1,037,644
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] |  |
Fair Value | 1,696,430 | 1,069,721
Amortized Cost | 1,478,310 | 1,774,119
Gross Unrealized Gain | 12,553 | 52,961
Gross Unrealized Loss | 78,557 | 3,243
Securities available-for-sale, at fair value | 1,412,306 | 1,823,837
Asset-backed Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 184,241 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 18,573 |
Fair Value | 165,668 |
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |  |
Amortized cost | 184,241 |
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] |  |
Fair Value | 165,668 |
Amortized Cost | 134,386 | 232,294
Gross Unrealized Gain | 0 | 60
Gross Unrealized Loss | 16,983 | 2,785
Securities available-for-sale, at fair value | 117,403 | 229,569
Corporate Debt Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 88,527 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 9,918 |
Fair Value | 78,609 |
Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |  |
Amortized cost | 88,527 |
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] |  |
Fair Value | 78,609 |
Amortized Cost | 515,221 | 114,355
Gross Unrealized Gain | 41 | 3,082
Gross Unrealized Loss | 48,018 | 2,506
Securities available-for-sale, at fair value | $ 467,244 | $ 114,931

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