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Interim Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Shares to be Issued for Deferred Compensation Obligations
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning balances at Dec. 31, 2017 $ 194,905 $ 140,277 $ 5,502 $ 51,728 $ (2,602)
Beginning balances, shares at Dec. 31, 2017   7,857,293      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Comprehensive income (loss) (993)     6,795 (7,788)
Issuance of common stock 3,272 $ 3,272      
Issuance of common stock, shares   121,437      
Common stock transferred from the Rabbi Trust to satisfy deferred compensation obligations 0 $ 383 (383)    
Share based payment awards under equity compensation plan 304   304    
Common stock purchased for deferred compensation obligations (205) (205)      
Common stock repurchased pursuant to publicly announced repurchase plan (1,238) $ (1,238)      
Common stock repurchased pursuant to publicly announced repurchase plan, shares   (45,480)      
Cash dividends (4,096)     (4,096)  
Ending balances at Jun. 30, 2018 191,949 $ 142,489 5,423 54,204 (10,167)
Ending balances, shares at Jun. 30, 2018   7,933,250      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Cumulative Effect of New Accounting Principle in Period of Adoption 0     (223) 223
Beginning balances at Dec. 31, 2018 $ 195,519 $ 140,416 5,431 57,357 (7,685)
Beginning balances, shares at Dec. 31, 2018 7,870,969 7,870,969      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Comprehensive income (loss) $ 16,136     7,684 8,452
Issuance of common stock 2,436 $ 2,436      
Issuance of common stock, shares   104,598      
Common stock transferred from the Rabbi Trust to satisfy deferred compensation obligations 0 $ 268 (268)    
Share based payment awards under equity compensation plan 271   271    
Common stock purchased for deferred compensation obligations (816) (816)      
Common stock repurchased pursuant to publicly announced repurchase plan (1,339) $ (1,339)      
Common stock repurchased pursuant to publicly announced repurchase plan, shares   (57,073)      
Cash dividends (4,093)     (4,093)  
Ending balances at Jun. 30, 2019 $ 208,114 $ 140,965 $ 5,434 $ 60,948 $ 767
Ending balances, shares at Jun. 30, 2019 7,918,494 7,918,494