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Derivative Instruments - Hedge Derivatives (Details) - USD ($)
 1 Months Ended 3 Months Ended
Apr. 30, 2022
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Derivative [Line Items]        
Net gain on cash flow hedges reclassified from other comprehensive income into net income, net of tax   $ (2,476,000) $ (2,509,000)  
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months   9,800,000    
Cash flow hedge | Hedging derivative | Asset derivatives        
Derivative [Line Items]        
Notional Amount   1,750,000,000   $ 1,750,000,000
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)   11,978,000 0  
Cash Flow Hedges Derivative Instruments at Fair Value, Net   107,735,000   94,175,000
Fair value hedge | Hedging derivative        
Derivative [Line Items]        
Forecasted Notional Amount   1,845,724,000   1,420,724,000
Fair Value Hedge Assets [1]   34,347,000   56,056,000
Fair value hedge | Hedging derivative | Securities        
Derivative [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings $ 986,000,000 (31,685,000) 48,839,000  
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge   31,685,000 (48,839,000)  
Derivative Instruments and Hedges, Assets   1,465,424,000   1,445,511,000
Fair Value Hedging Adjustment   (32,464,000)   (56,056,000)
Gain (Loss) on Fair Value Hedges Recognized in Earnings 11,200,000      
Fair value hedge | Hedging derivative | Securities | Asset derivatives        
Derivative [Line Items]        
Forecasted Notional Amount   $ 1,420,724,000   1,420,724,000
Derivative Asset, Statement of Financial Position   Other assets    
Weighted Average Remaining Maturity   7 years 2 months 4 days    
Pay Rate (as percent)   2.25%    
Derivative, Type of Interest Rate Paid on Swap   3 month LIBOR/ Federal Funds/ SOFR    
Fair Value Hedge Assets [1]   $ 32,464,000   $ 56,056,000
Terminated Notional Amount of Interest Rate Derivatives 164,300,000      
Terminated Fair Value Amount of Interest Rate Derivatives $ 14,300,000      
Fair value hedge | Hedging derivative | Securities | Liability derivatives        
Derivative [Line Items]        
Derivative Liability, Statement of Financial Position [Extensible Enumeration]       Other liabilities
Fair value hedge | Hedging derivative | Securities | Federal Funds Rate        
Derivative [Line Items]        
Forecasted Notional Amount   392,200,000    
Fair value hedge | Hedging derivative | Securities | Secured Overnight Financing Rate        
Derivative [Line Items]        
Forecasted Notional Amount   563,800,000    
Fair value hedge | Hedging derivative | Securities | LIBOR        
Derivative [Line Items]        
Forecasted Notional Amount   464,700,000    
Fair value hedge | Hedging derivative | Loans        
Derivative [Line Items]        
Amortization expense, reduction to interest income on loans   210,000 639,000  
Fair value hedge | Hedging derivative | Federal Home Loan Bank Advances        
Derivative [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings   1,883,000 0  
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge   (1,883,000) $ 0  
Derivative Instruments and Hedges, Assets   426,883,000   $ 0
Fair Value Hedging Adjustment   1,883,000   0
Fair value hedge | Hedging derivative | Federal Home Loan Bank Advances | Liability derivatives        
Derivative [Line Items]        
Forecasted Notional Amount   $ 425,000,000   0
Weighted Average Remaining Maturity   4 years 10 months 2 days    
Pay Rate (as percent)   0.00%    
Derivative, Type of Interest Rate Paid on Swap   N/A    
Fair Value Hedge Assets [1]   $ 1,883,000   $ 0
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Other liabilities    
Interest Rate Floor | Hedging derivative | Asset derivatives        
Derivative [Line Items]        
Derivative Asset, Statement of Financial Position       Other assets
Weighted Average Remaining Maturity   4 years 7 months 2 days    
Notional Amount   $ 875,000,000   $ 875,000,000
Derivative, Type of Interest Received   4.00%-4.50% minus USD-Term SOFR 1M    
Derivative, Type Of Interest Rate Paid On Swap1   N/A    
Cash Flow Hedges Derivative Instruments at Fair Value, Net   $ 54,091,000   $ 48,622,000
Interest Rate Contract | Hedging derivative | Asset derivatives        
Derivative [Line Items]        
Derivative Asset, Statement of Financial Position       Other assets
Weighted Average Remaining Maturity   4 years 7 months 2 days    
Notional Amount   $ 875,000,000   $ 875,000,000
Derivative, Type of Interest Received   4.25%-4.75% minus USD-Term SOFR 1M    
Derivative, Type Of Interest Rate Paid On Swap1   USD-Term SOFR 1M minus 6.75%-7.00%    
Cash Flow Hedges Derivative Instruments at Fair Value, Net   $ 53,644,000   $ 45,553,000
[1] The variation margin payments for derivatives cleared through central clearing houses are characterized as settlements. At March 31, 2023 and December 31, 2022, the notional amount of fair value derivatives cleared through central clearing houses was $1.3 billion and $877.7 million with a fair value that approximates zero due to $39.8 million and $47.9 million in received variation margin.