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Derivative Financial Instruments - Summary of Fair Value of Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Designated as Hedging Instrument    
Derivative [Line Items]    
Assets $ 2,670 $ 10,472
Liabilities 15,063 6,014
Designated as Hedging Instrument | Cash flow hedges | Interest rate swaps, collars, and floors on loan pools    
Derivative [Line Items]    
Notional 1,800,000 1,600,000
Assets 2,670 10,472
Liabilities 15,063 6,014
Designated as Hedging Instrument | Cash flow hedges | Interest rate swaps on borrowings    
Derivative [Line Items]    
Notional 150,000 150,000
Assets 0 0
Liabilities 0 0
Designated as Hedging Instrument | Fair value hedges | Interest rate swaps on borrowings    
Derivative [Line Items]    
Notional 900,000 900,000
Assets 0 0
Liabilities 0 0
Designated as Hedging Instrument | Fair value hedges | Interest rate swaps on investment securities    
Derivative [Line Items]    
Notional 998,107 998,107
Assets 0 0
Liabilities 0 0
Not Designated as Hedging Instrument    
Derivative [Line Items]    
Assets 164,809 155,830
Liabilities 282,340 262,902
Not Designated as Hedging Instrument | Interest rate lock commitments    
Derivative [Line Items]    
Notional 67,995 25,151
Assets 317 291
Liabilities 0 0
Not Designated as Hedging Instrument | Forward mortgage loan contracts    
Derivative [Line Items]    
Notional 77,584 39,529
Assets 144 0
Liabilities 0 566
Not Designated as Hedging Instrument | Customer interest rate swaps    
Derivative [Line Items]    
Notional 5,886,639 5,954,216
Assets 11,328 33,182
Liabilities 270,910 228,750
Not Designated as Hedging Instrument | Counterparty interest rate swaps    
Derivative [Line Items]    
Notional 5,886,639 5,954,216
Assets 152,855 121,969
Liabilities 11,380 33,346
Not Designated as Hedging Instrument | Customer foreign currency contracts    
Derivative [Line Items]    
Notional 10,317 12,455
Assets 57 320
Liabilities 43 59
Not Designated as Hedging Instrument | Counterparty foreign currency contracts    
Derivative [Line Items]    
Notional 10,484 12,308
Assets 108 68
Liabilities $ 7 $ 181