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Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) $ in Thousands | Dec. 31, 2023 USD ($) position | Dec. 31, 2022 USD ($) position
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Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | $ 157,612 | $ 166,715
Derivative Liability, Fair Value, Gross Liability | (245,584) | (296,766)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 146,416 | 2,108,595
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (3,240) | (256,382)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 2,145,336 | 477,373
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | (298,236) | (89,665)
Debt Securities, Available-for-sale, Unrealized Loss Position | 2,291,752 | 2,585,968
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (301,476) | (346,047)
Estimated Fair Value, Less Than 12 Months | 0 | 504,922
Unrealized Losses, Less Than 12 Months | $ 0 | $ (38,304)
Debt securities, held-to-maturity, number of positions | position | 180 | 180,000,000
Estimated Fair Value, 12 Months or Longer | $ 1,072,207 | $ 620,127
Unrealized Losses, 12 Months or Longer | (195,715) | (157,903)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value | 1,072,207 | 1,125,049
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss | (195,715) | (196,207)
U.S. Government securities |  |
Derivatives, Fair Value [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 0 | 96,906
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | (2,814)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 42,161 | 121,579
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | (314) | (4,841)
Debt Securities, Available-for-sale, Unrealized Loss Position | 42,161 | 218,485
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (314) | (7,655)
Residential mortgage-backed securities |  |
Derivatives, Fair Value [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 409 | 154,861
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (3) | (18,301)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 195,453 | 55,293
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | (26,482) | (11,546)
Debt Securities, Available-for-sale, Unrealized Loss Position | 195,862 | 210,154
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (26,485) | (29,847)
Estimated Fair Value, Less Than 12 Months | 0 | 246,667
Unrealized Losses, Less Than 12 Months | 0 | (14,275)
Estimated Fair Value, 12 Months or Longer | 355,270 | 153,178
Unrealized Losses, 12 Months or Longer | (51,805) | (43,205)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value | 355,270 | 399,845
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss | (51,805) | (57,480)
Commercial mortgage-backed securities |  |
Derivatives, Fair Value [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 26,907 | 371,109
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,053) | (38,845)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 507,481 | 181,413
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | (91,923) | (40,237)
Debt Securities, Available-for-sale, Unrealized Loss Position | 534,388 | 552,522
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (92,976) | (79,082)
Estimated Fair Value, Less Than 12 Months | 0 | 258,255
Unrealized Losses, Less Than 12 Months | 0 | (24,029)
Estimated Fair Value, 12 Months or Longer | 716,937 | 466,949
Unrealized Losses, 12 Months or Longer | (143,910) | (114,698)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value | 716,937 | 725,204
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss | (143,910) | (138,727)
US Government Agencies Debt Securities |  |
Derivatives, Fair Value [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 0 | 1,008
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | (42)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 1,010 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | (28) | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | 1,010 | 1,008
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (28) | (42)
Interest Rate Locks with Customers |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Notional Amount | 119,558 | 70,836
Derivative Liability, Notional Amount | 1,015 | 4,939
Derivative Asset, Fair Value, Gross Asset | 460 | 182
Interest Rate Locks with Customers | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | (2) | (51)
Forward Commitments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Notional Amount | 0 | 0
Derivative Liability, Notional Amount | 42,000 | 10,000
Derivative Asset, Fair Value, Gross Asset | 0 | 0
Forward Commitments | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | (854) | (147)
Interest Rate Derivatives with Customers |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Notional Amount | 824,659 | 171,317
Derivative Liability, Notional Amount | 3,784,236 | 3,802,480
Derivative Asset, Fair Value, Gross Asset | 22,656 | 3,337
Interest Rate Derivatives with Customers | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | (222,530) | (280,401)
Interest Rate Swap With Counterparty [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Notional Amount | 3,784,236 | 3,802,480
Derivative Liability, Notional Amount | 824,659 | 171,317
Derivative Asset, Fair Value, Gross Asset | 128,235 | 161,956
Interest Rate Swap With Counterparty [Member] | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | (23,023) | (3,703)
Interest Rate Swaps Used in Cash Flow Hedges [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Notional Amount | 2,500,000 | 600,000
Derivative Liability, Notional Amount | 750,000 | 1,000,000
Derivative Asset, Fair Value, Gross Asset | 6,189 | 1,321
Interest Rate Swaps Used in Cash Flow Hedges [Member] | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | 0 | (12,163)
Foreign Exchange Contracts with Customers |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Notional Amount | 4,159 | 11,123
Derivative Liability, Notional Amount | 13,353 | 3,672
Derivative Asset, Fair Value, Gross Asset | 40 | 571
Foreign Exchange Contracts with Customers | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | (446) | (85)
Foreign Exchange Contracts with Correspondent Banks |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Notional Amount | 15,969 | 4,887
Derivative Liability, Notional Amount | 6,112 | 8,280
Derivative Asset, Fair Value, Gross Asset | 532 | 101
Foreign Exchange Contracts with Correspondent Banks | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | $ (31) | $ (499)

X
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