Fair Value - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	$ 72,158	$ 52,507
Investment securities available for sale	6,687,066	6,773,712
U.S. Treasury
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	221,872	200,927
U.S. government-sponsored entities and agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	1,193,691	1,175,080
Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	4,308,775	4,369,902
States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	621,487	663,852
Pooled trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	10,849	10,811
Other securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	330,392	353,140
Fair Value on Recurring Basis | Carrying Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	72,158	52,507
Residential loans held for sale	10,584	11,926
Derivative assets	166,069	169,001
Derivative liabilities	320,995	380,704
Fair Value on Recurring Basis | Carrying Value | U.S. Treasury
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	221,872	200,927
Fair Value on Recurring Basis | Carrying Value | U.S. government-sponsored entities and agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	1,193,691	1,175,080
Fair Value on Recurring Basis | Carrying Value | Mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	4,308,775	4,369,902
Fair Value on Recurring Basis | Carrying Value | States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	621,487	663,852
Fair Value on Recurring Basis | Carrying Value | Pooled trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	10,849	10,811
Fair Value on Recurring Basis | Carrying Value | Other securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	330,392	353,140
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	72,158	52,507
Residential loans held for sale	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	0	0
Residential loans held for sale	10,584	11,926
Derivative assets	166,069	169,001
Derivative liabilities	320,995	380,704
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Equity securities	0	0
Residential loans held for sale	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. Treasury | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	221,872	200,927
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. Treasury | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. Treasury | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. government-sponsored entities and agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. government-sponsored entities and agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	1,193,691	1,175,080
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | U.S. government-sponsored entities and agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	4,308,775	4,369,902
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | States and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	621,487	663,852
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | States and political subdivisions | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Pooled trust preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Pooled trust preferred securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	10,849	10,811
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Pooled trust preferred securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Other securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	0	0
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Other securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	330,392	353,140
Fair Value on Recurring Basis | Estimate of Fair Value Measurement | Other securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment securities available for sale	$ 0	$ 0