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Derivative Instruments - Hedge Derivatives (Details) - USD ($)
 1 Months Ended 12 Months Ended
Oct. 13, 2022
Apr. 30, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Derivative [Line Items]          
Net gain on cash flow hedges reclassified from other comprehensive income into net income, net of tax     $ (9,689,000) $ (9,975,000) $ (9,645,000)
Amortization     3,300,000 2,800,000 1,600,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months     9,000,000    
Hedging derivative | Fair value hedge          
Derivative [Line Items]          
Notional     3,287,139,000 1,420,724,000  
Amortization     645,000 1,900,000 3,500,000
Fair Value Hedges, Net [1]     43,706,000 56,056,000  
Hedging derivative | Fair value hedge | Federal Funds Rate          
Derivative [Line Items]          
Forecasted Notional Amount of Interest Rate Derivatives     392,200,000    
Hedging derivative | Fair value hedge | Secured Overnight Financing Rate          
Derivative [Line Items]          
Forecasted Notional Amount of Interest Rate Derivatives     2,900,000,000    
Hedging derivative | Fair value hedge | Federal Home Loan Bank Advances          
Derivative [Line Items]          
Gain (Loss) on Fair Value Hedges Recognized in Earnings     1,998,000 0 0
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge     (1,998,000) 0 0
Fair Value Hedges, Net     (2,023,000)    
Forecasted Notional Amount of Interest Rate Derivatives     1,200,000,000    
Hedging derivative | Fair value hedge | Federal Home Loan Bank Certificates and Obligations (FHLB)          
Derivative [Line Items]          
Derivative Instruments and Hedges, Assets     1,173,002,000 0  
Fair Value Hedging Adjustment     (1,998,000) 0  
Hedging derivative | Fair value hedge | Securities          
Derivative [Line Items]          
Derivative Instruments and Hedges, Assets     2,074,621,000 1,445,511,000  
Fair Value Hedging Adjustment     (41,708,000) (56,056,000)  
Gain (Loss) on Fair Value Hedges Recognized in Earnings     (14,348,000) 80,728,000 42,642,000
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge     14,348,000 (80,728,000) (42,642,000)
Asset derivatives | Hedging derivative | Cash flow hedge          
Derivative [Line Items]          
Unrealized Gain (Loss) in Accumulated Other Comprehensive Income     (7,414,000) 1,002,000 $ (15,034,000)
Notional     1,750,000,000 1,750,000,000  
Cash Flow Hedges Derivative Instruments at Fair Value, Net     $ 74,797,000 94,175,000  
Asset derivatives | Hedging derivative | Fair value hedge | Federal Home Loan Bank Advances          
Derivative [Line Items]          
Pay Rate (as percent)     0.00%    
Notional     $ 750,000,000 0  
Weighted Average Remaining Maturity Derivative     3 years 6 months 10 days    
Derivative, Underlying Basis     N/A    
Fair Value Hedge Assets [1]     $ 3,654,000 0  
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)     1.97%    
Gain (Loss) on Fair Value Hedges Recognized in Earnings   $ 986,000      
Notional     $ 543,061,000 1,420,724,000  
Weighted Average Remaining Maturity Derivative     10 years 1 month 28 days    
Derivative, Underlying Basis     Federal funds/SOFR    
Fair Value Hedge Assets [1]     $ 42,983,000 $ 56,056,000  
Derivative Asset, Statement of Financial Position [Extensible Enumeration]     Other assets Other assets  
Gain (Loss) on Fair Value Hedges to be Recognized in Earnings   10,000,000      
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     $ 36,483,000 $ 48,622,000  
Weighted Average Remaining Maturity Derivative     3 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     $ 38,314,000 $ 45,553,000  
Weighted Average Remaining Maturity Derivative     3 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)     0.00%    
Weighted Average Remaining Maturity Derivative     4 years 1 month 2 days    
Derivative, Underlying Basis     N/A    
Fair Value Hedge Liabilities [1]     $ (1,656,000) $ 0  
Forecasted Notional Amount of Interest Rate Derivatives     $ 425,000,000 0  
Derivative Liability, Statement of Financial Position [Extensible Enumeration]     Other liabilities    
Liability derivatives | Hedging derivative | Fair value hedge | Securities          
Derivative [Line Items]          
Pay Rate (as percent)     3.10%    
Notional     $ 1,569,078,000 0  
Weighted Average Remaining Maturity Derivative     11 years 2 months 19 days    
Derivative, Underlying Basis     Federal funds/SOFR    
Fair Value Hedge Liabilities [1]     $ (1,275,000) $ 0  
Derivative Liability, Statement of Financial Position [Extensible Enumeration]     Other liabilities    
Cash flow hedge | Hedging derivative          
Derivative [Line Items]          
Notional $ 1,800,000,000        
Derivative, Cost of Hedge $ 95,700,000        
[1] The variation margin payments for derivatives cleared through central clearing houses are characterized as settlements. At December 31, 2023 and 2022, the notional amount of fair value derivatives hedges cleared through clearing houses is $2.0 billion and $877.7 million with a fair value that approximates zero due to $4.0 million and $47.9 million in variation margin payments.