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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Common Stock [Member]
Common Stock [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Surplus [Member]
Surplus [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Treasury Stock [Member]
Treasury Stock [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Loss [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at Dec. 31, 2018 $ 469,013 $ 661 $ 469,674 $ 16,459 $ 16,459 $ 309,088 $ 309,088 $ (8,988) $ (8,988) $ 154,799 $ 661 $ 155,460 $ (2,345) $ (2,345)
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201602Member                          
Net income $ 22,975                 22,975        
Other comprehensive income (loss) 741                       741  
Restricted stock units issued       109   (109)                
Restricted stock units/awards repurchased on vesting to pay taxes (981)     (30)   (951)                
Amortization of restricted stock awards/units 2,865         2,865                
Cash dividends declared on common stock (1,940)                 (1,940)        
Common stock options exercised 22     1   21                
Exercise of warrants       2   (2)                
Issuance of shares for Employee Stock Purchase Plan 532     15   517                
Issuance of common stock for acquisitions       1   (1)                
Balance at Jun. 30, 2019 493,888     16,557   311,428   (8,988)   176,495     (1,604)  
Balance at Mar. 31, 2019 481,472     16,549   309,722   (8,988)   165,918     (1,729)  
Net income 11,550                 11,550        
Other comprehensive income (loss) 125                       125  
Restricted stock units issued       1   (1)                
Restricted stock units/awards repurchased on vesting to pay taxes (17)         (17)                
Amortization of restricted stock awards/units 1,475         1,475                
Cash dividends declared on common stock (973)                 (973)        
Common stock options exercised 18         18                
Issuance of shares for Employee Stock Purchase Plan 238     7   231                
Balance at Jun. 30, 2019 493,888     16,557   311,428   (8,988)   176,495     (1,604)  
Balance at Dec. 31, 2019 503,652     16,733   319,375   (29,990)   199,029     (1,495)  
Net income 9,615                 9,615        
Other comprehensive income (loss) (501)                       (501)  
Restricted stock units issued       131   (131)                
Restricted stock units/awards repurchased on vesting to pay taxes (643)     (33)   (610)                
Amortization of restricted stock awards/units 3,264         3,264                
Cash dividends declared on common stock (1,887)                 (1,887)        
Share repurchase (6,487)             (6,487)            
Common stock options exercised 76     7   69                
Exercise of warrants       6   (6)                
Issuance of shares for Employee Stock Purchase Plan 891     39   852                
Issuance of common stock for acquisitions       17   (17)                
Balance at Jun. 30, 2020 507,980     16,900   322,796   (36,477)   206,757     (1,996)  
Balance at Mar. 31, 2020 496,440     16,854   320,269   (36,477)   199,453     (3,659)  
Net income 8,242                 8,242        
Other comprehensive income (loss) 1,663                       1,663  
Restricted stock units issued       6   (6)                
Restricted stock units/awards repurchased on vesting to pay taxes (42)     (2)   (40)                
Amortization of restricted stock awards/units 1,723         1,723                
Cash dividends declared on common stock (938)                 (938)        
Common stock options exercised 1     3   (2)                
Issuance of shares for Employee Stock Purchase Plan 891     39   852                
Balance at Jun. 30, 2020 $ 507,980     $ 16,900   $ 322,796   $ (36,477)   $ 206,757     $ (1,996)