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Business Combinations - Additional Information (Details) - USD ($)
 12 Months Ended
Feb. 02, 2021
Sep. 25, 2020
Dec. 31, 2021
Dec. 31, 2020
Business Acquisition [Line Items]        
Common stock, par value (in dollars per share)     $ 4 $ 4
Intangible assets amortization period     15 years  
LINCO Bancshares, Inc.        
Business Acquisition [Line Items]        
Percentage of issued and outstanding shares acquired   100.00%    
Common stock, par value (in dollars per share)   $ 1.00    
Share Price   $ 4.00    
Consideration payable in cash $ 103,500,000 $ 103,500,000    
Consideration payable in shares   1,262,246    
Dividends paid   $ 13,000,000    
Goodwill acquired during period 5,400,000      
Pre-tax of acquisition costs 9,100,000   $ 8,600,000  
Loans 828,976,000      
Accreted to interest income over the remaining term of loans 11,100,000      
Elimination of deferred fees and unearned discounts previously recorded by Providence Bank 1,700,000      
Allowance for credit losses for loans identified as PCD 2,000,000   2,074,000  
Purchased credit deteriorated loans     $ 64,647,000  
Change in acquired time deposits 990,410,000      
Change in FHLB advances 27,916,000      
LINCO Bancshares, Inc. | Core Deposit Intangibles        
Business Acquisition [Line Items]        
Intangible assets fair value $ 2,148,000      
Intangible assets amortization period 10 years      
LINCO Bancshares, Inc. | Fair Value Adjustments        
Business Acquisition [Line Items]        
Consideration payable in cash $ 0      
Loans (9,401,000)      
Change in acquired time deposits 2,081,000      
Change in FHLB advances 975,000      
LINCO Bancshares, Inc. | Fair Value Adjustments | Core Deposit Intangibles        
Business Acquisition [Line Items]        
Intangible assets fair value 2,025,000      
LINCO Bancshares, Inc. | Acquired Book Value        
Business Acquisition [Line Items]        
Consideration payable in cash 0      
Loans 838,377,000      
Purchased credit deteriorated loans 64,600,000      
Change in acquired time deposits 988,329,000      
Change in FHLB advances 26,941,000      
LINCO Bancshares, Inc. | Acquired Book Value | Core Deposit Intangibles        
Business Acquisition [Line Items]        
Intangible assets fair value $ 123,000