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v3.22.2.2

Investment Securities - Amortized Cost and Fair Value of Available-for-Sale Investment Securities Portfolio (Details) - USD ($) | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Available-for-Sale |  |
Total | $ 7,879,108,000 | $ 7,384,033,000
Unrealized Gains | 817,000 | 112,282,000
Unrealized Losses | (861,164,000) | (118,235,000)
Basis Adjustments | 0 | 0
Basis adjustments | (155,781,000) | 3,986,000
Fair Value | 6,862,980,000 | 7,382,066,000
Held-to-Maturity |  |
Allowance for securities held-to-maturity | (150,000) |
Total held-to-maturity securities | 3,096,567,000 | 0
Unrealized Gains | 0 |
Unrealized Losses | (496,127,000) |
Basis adjustments | 0 |
Fair Value | 2,600,440,000 | 0
U.S. Treasury |  |
Available-for-Sale |  |
Total | 246,987,000 | 234,555,000
Unrealized Gains | 0 | 1,233,000
Unrealized Losses | (7,010,000) | (7,751,000)
Basis adjustments | (46,372,000) | 7,547,000
Fair Value | 193,605,000 | 235,584,000
U.S. government-sponsored entities and agencies |  |
Available-for-Sale |  |
Total | 1,453,829,000 | 1,575,994,000
Unrealized Gains | 0 | 7,354,000
Unrealized Losses | (168,963,000) | (37,014,000)
Basis adjustments | (109,409,000) | (3,561,000)
Fair Value | 1,175,457,000 | 1,542,773,000
Held-to-Maturity |  |
Amortized Cost | 817,489,000 |
Unrealized Gains | 0 |
Unrealized Losses | (159,054,000) |
Basis adjustments | 0 |
Fair Value | 658,435,000 |
Mortgage-backed securities |  |
Available-for-Sale |  |
Total | 5,074,503,000 | 3,737,484,000
Unrealized Gains | 56,000 | 27,421,000
Unrealized Losses | (615,032,000) | (66,074,000)
Basis adjustments | 0 | 0
Fair Value | 4,459,527,000 | 3,698,831,000
Held-to-Maturity |  |
Amortized Cost | 1,124,714,000 |
Unrealized Gains | 0 |
Unrealized Losses | (123,568,000) |
Basis adjustments | 0 |
Fair Value | 1,001,146,000 |
States and political subdivisions |  |
Available-for-Sale |  |
Total | 713,669,000 | 1,587,172,000
Unrealized Gains | 666,000 | 69,696,000
Unrealized Losses | (39,288,000) | (1,882,000)
Basis adjustments | 0 | 0
Fair Value | 675,047,000 | 1,654,986,000
Held-to-Maturity |  |
Amortized Cost | 1,154,514,000 |
Unrealized Gains | 0 |
Unrealized Losses | (213,505,000) |
Basis adjustments | 0 |
Fair Value | 941,009,000 |
Pooled trust preferred securities |  |
Available-for-Sale |  |
Total | 13,776,000 | 13,756,000
Unrealized Gains | 0 | 0
Unrealized Losses | (2,454,000) | (4,260,000)
Basis adjustments | 0 | 0
Fair Value | 11,322,000 | 9,496,000
Other securities |  |
Available-for-Sale |  |
Total | 376,344,000 | 235,072,000
Unrealized Gains | 95,000 | 6,578,000
Unrealized Losses | (28,417,000) | (1,254,000)
Basis adjustments | 0 | 0
Fair Value | $ 348,022,000 | $ 240,396,000

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