XML 142 R64.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2019
USD ($)
Facilities
$ / shares
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
Jul. 16, 2019
shares
Mar. 26, 2019
USD ($)
Jan. 01, 2019
USD ($)
Schedule Of Accounting Policies [Line Items]            
Full service facilities maintained by bank | Facilities 74          
Accrual of interest discontinued description principal or interest is past due 90 days or more, and the loan is not well secured or in the process of collection, or when serious doubt exists as to the collectability of a loan, the accrual of interest is discontinued.          
Commercial loans as a percentage of total loan 56.00%          
Residential real estate loans as a percentage of total loan 21.00%          
Installment loans as a percentage of total loan 19.00%          
Mortgage warehouse loans as a percentage of total loan 4.00%          
Period in which loan sold by mortgage company 30 days          
Minimum period loan held by mortgage company 90 days          
Mortgage warehousing maximum pay off period 30 days          
Costs are deferred due to the term $ 0          
Impaired loans charged off 90 days          
Status of Non-Accrual of Loan 90 days          
Impairment of Loan 30 days          
Intangibles, Gross $ 26,700,000          
Goodwill $ 151,238,000 $ 119,880,000 $ 119,880,000   $ 31,200,000  
Uncertain tax positions recognized 50.00%          
Shares, non-dilutive | shares 120,341 102,138 0      
Amount available for payment of dividend $ 43,700,000          
Compensation expense 920,000 $ 626,000 $ 460,000      
Reclassifications effect on net income $ 0          
Number of shares authorized to be repurchased | shares       2,250,000    
Number of shares repurchased | shares 99,407          
Average price per share repurchased | $ / shares $ 16.04          
Operating Lease, Right-of-Use Asset $ 3,500,000         $ 3,400,000
Measurement Input, Discount Rate [Member]            
Schedule Of Accounting Policies [Line Items]            
Factor considered to be significant for fair value measurement 10          
Buildings and Improvements [Member] | Minimum [Member]            
Schedule Of Accounting Policies [Line Items]            
Useful Life for depreciation 3 years          
Buildings and Improvements [Member] | Maximum [Member]            
Schedule Of Accounting Policies [Line Items]            
Useful Life for depreciation 40 years          
Furniture and Equipment [Member] | Minimum [Member]            
Schedule Of Accounting Policies [Line Items]            
Useful Life for depreciation 2 years          
Furniture and Equipment [Member] | Maximum [Member]            
Schedule Of Accounting Policies [Line Items]            
Useful Life for depreciation 20 days          
Accounting Standards Update 2018-02 [Member]            
Schedule Of Accounting Policies [Line Items]            
Stranded tax effects included in AOCI     $ 766,000