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Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Mar. 06, 2020
$ / shares
shares
Jan. 01, 2020
USD ($)
Dec. 31, 2021
USD ($)
segment
unit_Facility
$ / shares
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Jul. 16, 2019
shares
Dec. 31, 2018
USD ($)
Schedule Of Accounting Policies [Line Items]              
Full service facilities maintained by bank | unit_Facility     78        
Accrued Interest Receivable     $ 11,500,000 $ 13,300,000      
Minimum period required for satisfactory performance to return loan from non-accrual to accrual status     6 months        
Commercial loans as a percentage of total loan     60.00%        
Residential real estate loans as a percentage of total loan     17.00%        
Installment loans as a percentage of total loan     20.00%        
Mortgage warehouse loans as a percentage of total loan     3.00%        
Investment in limited partnerships     $ 2,300,000 2,300,000      
Core deposit intangibles     20,900,000        
Goodwill     $ 154,572,000 $ 151,238,000 $ 151,238,000    
Uncertain tax positions recognized     50.00%        
Shares, non-dilutive (in shares) | shares     140,955 278,776 120,341    
Number of shares authorized to be repurchased | shares           2,250,000  
Number of shares repurchased | shares 1,000,000   803,349        
Average price per share repurchased | $ / shares $ 15.19   $ 16.89        
Amount available for payment of dividend     $ 108,500,000        
Compensation expense     $ 1,800,000 $ 1,300,000 $ 920,000    
Number of business segment | segment     1        
Stockholders’ Equity     $ 723,209,000 692,216,000 656,023,000   $ 491,992,000
Net income     87,091,000 68,499,000 66,538,000    
PCD loans charge–offs       2,786,000      
Revision of Prior Period, Change in Accounting Principle, Adjustment              
Schedule Of Accounting Policies [Line Items]              
Net income     $ 0        
Revision of Prior Period, Accounting Standards Update, Adjustment              
Schedule Of Accounting Policies [Line Items]              
Stockholders’ Equity       $ 15,600,000 $ (15,635,000)    
Measurement Input, Discount Rate              
Schedule Of Accounting Policies [Line Items]              
Factor considered to be significant for fair value measurement     0.10        
Minimum              
Schedule Of Accounting Policies [Line Items]              
Loan delinquency period     90 days        
Maximum              
Schedule Of Accounting Policies [Line Items]              
Allowance for loan losses charge down family first and junior lien mortgages past due period     180 days        
Allowance for loan losses charge down unsecured open end loans past due period     90 days        
Buildings and improvements | Minimum              
Schedule Of Accounting Policies [Line Items]              
Useful Life for depreciation     3 years        
Buildings and improvements | Maximum              
Schedule Of Accounting Policies [Line Items]              
Useful Life for depreciation     40 years        
Furniture and equipment | Minimum              
Schedule Of Accounting Policies [Line Items]              
Useful Life for depreciation     2 years        
Furniture and equipment | Maximum              
Schedule Of Accounting Policies [Line Items]              
Useful Life for depreciation     20 years        
Accounting Standards Update 2016-13              
Schedule Of Accounting Policies [Line Items]              
PCD loans charge–offs   $ 2,800,000