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Derivative Instruments - Hedge Derivatives (Details) - USD ($)
 1 Months Ended 12 Months Ended
Apr. 30, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Derivative [Line Items]        
Net gain on cash flow hedges reclassified from other comprehensive income into net income, net of tax   $ (8,999,000) $ (9,689,000) $ (9,975,000)
Amortization   4,600,000 3,300,000 2,800,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months   0    
Hedging derivative | Fair value hedge        
Derivative [Line Items]        
Notional   4,373,426,000 3,287,139,000  
Amortization   329,000 645,000 1,900,000
Fair Value Hedges, Net [1]   45,636,000 43,706,000  
Hedging derivative | Fair value hedge | Federal Funds Rate        
Derivative [Line Items]        
Forecasted Notional Amount of Interest Rate Derivatives   317,900,000    
Hedging derivative | Fair value hedge | Secured Overnight Financing Rate        
Derivative [Line Items]        
Forecasted Notional Amount of Interest Rate Derivatives   4,100,000,000    
Hedging derivative | Fair value hedge | Federal Home Loan Bank Advances        
Derivative [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings   (23,426,000) 1,998,000 0
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge   23,426,000 (1,998,000) 0
Fair Value Hedges, Net   (21,428,000)    
Hedging derivative | Fair value hedge | Federal Home Loan Bank Certificates and Obligations (FHLB)        
Derivative [Line Items]        
Derivative Instruments and Hedges, Assets   1,196,428,000 1,173,002,000  
Fair Value Hedging Adjustment   21,428,000 (1,998,000)  
Hedging derivative | Fair value hedge | Securities        
Derivative [Line Items]        
Derivative Instruments and Hedges, Assets   3,905,016,000 2,074,621,000  
Fair Value Hedging Adjustment   (67,064,000) (41,708,000)  
Gain (Loss) on Fair Value Hedges Recognized in Earnings   25,356,000 (14,348,000) 80,728,000
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge   (25,356,000) 14,348,000 (80,728,000)
Asset derivatives | Hedging derivative | Cash flow hedge        
Derivative [Line Items]        
Unrealized Gain (Loss) in Accumulated Other Comprehensive Income   (19,902,000) (7,414,000) $ 1,002,000
Notional   1,750,000,000 1,750,000,000  
Cash Flow Hedges Derivative Instruments at Fair Value, Net   $ 32,818,000 74,797,000  
Asset derivatives | Hedging derivative | Fair value hedge | Federal Home Loan Bank Advances        
Derivative [Line Items]        
Pay Rate (as percent)   0.00%    
Notional   $ 0 750,000,000  
Derivative, Underlying Basis   SOFR    
Fair Value Hedge Assets [1]   $ 0 3,654,000  
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Other assets    
Asset derivatives | Hedging derivative | Fair value hedge | Securities        
Derivative [Line Items]        
Pay Rate (as percent)   3.25%    
Gain (Loss) on Fair Value Hedges Recognized in Earnings $ 986,000      
Notional   $ 3,198,426,000 543,061,000  
Weighted Average Remaining Maturity Derivative   10 years 4 months 9 days    
Derivative, Underlying Basis   Federal Funds/SOFR    
Fair Value Hedge Assets [1]   $ 67,064,000 $ 42,983,000  
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Other assets Other assets  
Gain (Loss) on Fair Value Hedges to be Recognized in Earnings 5,500,000      
Terminated Fair Value Amount of Interest Rate Derivatives 14,300,000      
Terminated Notional Amount of Interest Rate Derivatives $ 164,300,000      
Asset derivatives | Hedging derivative | Interest Rate Floor        
Derivative [Line Items]        
Receive Rate   N/A    
Notional   $ 875,000,000 $ 875,000,000  
Cash Flow Hedges Derivative Instruments at Fair Value, Net   $ 15,566,000 $ 36,483,000  
Weighted Average Remaining Maturity Derivative   2 years 10 months 2 days    
Derivative, Type of Interest Received   4.00%-4.50% minus USD-Term SOFR 1M    
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Other assets Other assets  
Asset derivatives | Hedging derivative | Interest Rate Contract        
Derivative [Line Items]        
Receive Rate   USD-Term SOFR 1M minus 6.75%-7.00%    
Notional   $ 875,000,000 $ 875,000,000  
Cash Flow Hedges Derivative Instruments at Fair Value, Net   $ 17,252,000 $ 38,314,000  
Weighted Average Remaining Maturity Derivative   2 years 10 months 2 days    
Derivative, Type of Interest Received   4.25%-4.75% minus USD-Term SOFR 1M    
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Other assets Other assets  
Liability derivatives | Hedging derivative | Fair value hedge | Federal Home Loan Bank Advances        
Derivative [Line Items]        
Pay Rate (as percent)   3.48%    
Weighted Average Remaining Maturity Derivative   2 years 8 months 23 days    
Derivative, Underlying Basis   SOFR    
Fair Value Hedge Liabilities [1]   $ (21,428,000) $ (1,656,000)  
Forecasted Notional Amount of Interest Rate Derivatives   $ 1,175,000,000 425,000,000  
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Other liabilities    
Liability derivatives | Hedging derivative | Fair value hedge | Securities        
Derivative [Line Items]        
Notional   $ 0 1,569,078,000  
Derivative, Underlying Basis   Federal Funds/SOFR    
Fair Value Hedge Liabilities [1]   $ 0 $ (1,275,000)  
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Other liabilities    
Securities | Hedging derivative        
Derivative [Line Items]        
Notional   $ 300,000,000    
[1] The variation margin payments for derivatives cleared through central clearing houses are characterized as settlements. At December 31, 2024 and 2023, the notional amount of fair value derivatives hedges cleared through clearing houses is $3.0 billion and $2.0 billion with a fair value that approximates zero due to $72.7 million and $4.0 million in variation margin payments.