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Derivative Financial Instruments (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Derivative Financial Instruments |  |
Notional Amount | $ 24,452,059,000 | $ 20,979,193,000
Estimated Fair Value Gain | $ 172,939,000 | $ 211,016,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Estimated Fair Value Loss | $ 804,486,000 | $ 1,034,143,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Cash flow hedge liability | $ 0 | $ 0
Fair value of the interest rate swap derivatives, other assets | 169,000,000.0 | 209,800,000
Reduction in derivative asset fair value | 635,300,000 |
Fair value of the interest rate swap derivatives, other liabilities | 803,500,000 | 1,000,000.0
Reduction in derivative liability fair value |  | 824,300,000
Estimated gain (loss) on fair value | (2,600,000) | 163,000,000,000
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |
Fair value of forward commitments | (804,486,000) | (1,034,143,000)
Mortgage loan pipeline |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |
Obligation | 65,051,000 | 40,850,000
Expected closures |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |
Obligation | 54,993,000 | 37,210,000
Cash flow hedge |  |
Derivative Financial Instruments |  |
Collateral provided | 0 | 0
Cash flow hedge | Borrower |  |
Derivative Financial Instruments |  |
Collateral provided | 251,500,000 |
Cash flow hedge | Interest-bearing deposits | Counterparty |  |
Derivative Financial Instruments |  |
Cash collateral | 45,200,000 |
Interest rate contracts |  |
Derivative Financial Instruments |  |
Notional Amount | 22,600,000,000 | 20,900,000,000
Mortgage servicing rights hedging | Non-designated hedges |  |
Derivative Financial Instruments |  |
Notional Amount | 142,000,000.0 | 35,000,000.0
Mortgage servicing rights hedging | Non-designated hedges | Other Assets and Other Liabilities |  |
Derivative Financial Instruments |  |
Notional Amount | 142,000,000 | $ 35,000,000
Estimated Fair Value Gain | $ 2,605,000 |
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Estimated Fair Value Loss |  | $ 163,000
Mortgage loan pipeline commitments hedging |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |
Obligation | $ 1,154,000 | 524,000
Mortgage loan pipeline commitments hedging | Non-designated hedges | Other Assets |  |
Derivative Financial Instruments |  |
Notional Amount | 77,500,000 | 51,000,000
Estimated Fair Value Gain | $ 1,154,000 | $ 800,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Estimated Fair Value Loss | $ 947,000 |
Forward commitments |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |
Obligation | 77,500,000 | $ 51,000,000
Fair value of forward commitments | (947,000) | 276,000
Customer swaps | Cash flow hedge |  |
Derivative Financial Instruments |  |
Collateral provided | 104,100,000 |
Interest rate swap |  |
Derivative Financial Instruments |  |
Gain or loss recorded | 596,000 | 174,000
Interest rate swap | Fair Value Hedging | Counterparty |  |
Derivative Financial Instruments |  |
Notional Amount | 9,200,000 | 12,300,000
Amortized cost basis of loans hedged | 9,700,000 | 10,300,000
Interest rate swap | Fair Value Hedging | Other Liabilities | Counterparty |  |
Derivative Financial Instruments |  |
Notional Amount | 9,188,000 | 12,289,000
Estimated Fair Value Gain | $ 220,000 | $ 414,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Interest rate swap | Non-designated hedges | Other Assets and Other Liabilities | Borrower |  |
Derivative Financial Instruments |  |
Notional Amount | $ 11,327,419,000 | $ 10,480,171,000
Estimated Fair Value Gain | $ 60,145,000 | $ 8,539,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Estimated Fair Value Loss | $ 803,539,000 | $ 1,033,980,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Interest rate swap | Non-designated hedges | Other Assets and Other Liabilities | Counterparty |  |
Derivative Financial Instruments |  |
Notional Amount | $ 11,235,952,000 | $ 10,400,733,000
Estimated Fair Value Gain | $ 108,820,000 | $ 201,263,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other
Interest rate swap | Non-designated hedges | Other Assets | Counterparty |  |
Derivative Financial Instruments |  |
Reduction in derivative asset fair value | $ 635,300,000 |
Interest rate swap | Economic hedges | Counterparty |  |
Derivative Financial Instruments |  |
Notional Amount | 1,700,000,000 | $ 0
Estimated Fair Value Loss | 5,000 |
Interest rate swap | Economic hedges | Other Assets | Counterparty |  |
Derivative Financial Instruments |  |
Notional Amount | 1,660,000,000 |
Estimated Fair Value Loss | 5,000 |
Foreign exchange contract |  |
Derivative Financial Instruments |  |
Gain or loss recorded | $ 0 | $ 0

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