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Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Derivative [Line Items]          
Derivative, Net Liability Position, Aggregate Fair Value $ 35,800   $ 35,800    
Other comprehensive income (loss), unrealized gain (loss) on derivatives arising during period, before tax     (7,898) $ (3,004) $ 0
Derivative Liability, Notional Amount 0   0    
Summary of Derivative Instruments [Abstract]          
Securities Sold under Agreements to Repurchase, Gross 271,081   271,081 230,886  
Securities Sold under Agreements to Repurchase, Asset 0   0 0  
Securities sold under agreement to repurchase 271,081   271,081 230,886  
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities 0   0 0  
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash 271,081   271,081 230,886  
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral 0   0 0  
Collateral Already Posted, Aggregate Fair Value 36,500   36,500    
swap termination fee 3,200        
repayment of fhlb advances 200,000   200,000    
interest rate swaps terminated 200,000   200,000    
Interest rate swap contracts          
Derivative [Line Items]          
Pledged cash as collateral in connection with interest rate swap agreements 34,903   34,903 14,573  
Summary of Derivative Instruments [Abstract]          
Derivative Asset, Fair Value, Gross Asset 28,703   28,703 11,055  
Liability derivatives (other liabilities), fair value 34,967   34,967 14,747  
Derivative Asset, Fair Value, Gross Liability 0   0 0  
Derivative financial instruments 28,703   28,703 11,055  
Derivative, Collateral, Obligation to Return Securities 2   2 56  
Derivative, Collateral, Obligation to Return Cash 0   0 0  
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 28,701   28,701 10,999  
Derivative Liability, Fair Value, Gross Asset 0   0 0  
Derivative financial instruments 34,967   34,967 14,747  
Derivative, Collateral, Right to Reclaim Securities 2   2 56  
Derivative Liability, Fair Value, Amount Offset Against Collateral 62   62 118  
Designated as Hedging Instrument [Member] | Other Assets | Interest Rate Contract [Member]          
Derivative [Line Items]          
Notional 61,962   61,962 61,962  
Summary of Derivative Instruments [Abstract]          
Derivative Asset, Fair Value, Gross Asset 0   0 0  
Designated as Hedging Instrument [Member] | Other Liabilities | Interest Rate Contract [Member]          
Summary of Derivative Instruments [Abstract]          
Liability derivatives (other liabilities), fair value 5,987   5,987 2,872  
Non-designated hedging instruments | Other Assets | Interest Rate Contract [Member]          
Derivative [Line Items]          
Notional 1,026,016   1,026,016 749,819  
Summary of Derivative Instruments [Abstract]          
Derivative Asset, Fair Value, Gross Asset 28,703   28,703 11,055  
Non-designated hedging instruments | Other Liabilities | Interest Rate Contract [Member]          
Summary of Derivative Instruments [Abstract]          
Liability derivatives (other liabilities), fair value 28,980   28,980 $ 11,875  
Cash Flow Hedging | Subordinated debentures and notes          
Derivative [Line Items]          
Notional $ 62,000   $ 62,000    
Derivative, Variable Interest Rate 2.62%   2.62%    
Cash Flow Hedging | Forecast [Member]          
Summary of Derivative Instruments [Abstract]          
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net   $ 1,500