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Consolidated Statements of Changes to Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2016 $ 125,577 $ 11,947 $ (12,267) $ 127,869 $ (1,972)
Beginning balance, shares at Dec. 31, 2016   9,241,750      
Net income 12,720     12,720  
Other comprehensive income (loss) 146       146
Purchase of treasury stock (196)   (196)    
Purchase of treasury stock, shares   (6,790)      
Issuance of 32,000, 33,000 and 38,100 shares of restricted stock (Net of forfeitures - 1,080, 2,620 and 3,220) for the period ended 2017, 2018 and 2019 respectively (35) $ (908) 303 570  
Issuance of 32,000, 33,000 and 38,100 shares of restricted stock (Net of forfeitures - 1,080, 2,620 and 3,220) for the period ended 2017, 2018 and 2019 respectively, Shares   30,920      
Stock-based compensation expense 507 $ 507      
Cash dividends declared - 0.50, 0.56 and 0.61 per share for the period ended 2017, 2018 and 2019 respectively (4,582)     (4,582)  
Ending balance at Dec. 31, 2017 134,137 $ 11,546 (12,160) 136,577 (1,826)
Ending balance, shares at Dec. 31, 2017   9,265,880      
Adoption of ASU 2017-08, cumulative effect | ASU 2017-08 [Member] (30)     (30)  
Ending balance, adjusted 134,107 $ 11,546 (12,160) 136,547 (1,826)
Net income 14,949     14,949  
Other comprehensive income (loss) (829)       (829)
Adoption of ASU 2018-02 | ASU 2018-02 [Member]       359 (359)
Purchase of treasury stock (490)   (490)    
Purchase of treasury stock, shares   (10,999)      
Issuance of 32,000, 33,000 and 38,100 shares of restricted stock (Net of forfeitures - 1,080, 2,620 and 3,220) for the period ended 2017, 2018 and 2019 respectively (53) $ (1,468) 241 1,174  
Issuance of 32,000, 33,000 and 38,100 shares of restricted stock (Net of forfeitures - 1,080, 2,620 and 3,220) for the period ended 2017, 2018 and 2019 respectively, Shares   30,380      
Stock-based compensation expense 745 $ 745      
Cash dividends declared - 0.50, 0.56 and 0.61 per share for the period ended 2017, 2018 and 2019 respectively (5,142)     (5,142)  
Ending balance at Dec. 31, 2018 143,287 $ 10,823 (12,409) 147,887 (3,014)
Ending balance, shares at Dec. 31, 2018   9,285,261      
Net income 18,402     18,402  
Other comprehensive income (loss) 4,112       4,112
Issuance of 1,830,000 shares of common stock in acquisition 70,437 $ 70,437      
Issuance of 1,830,000 shares of common stock in acquisition, shares   1,830,000      
Purchase of treasury stock (381)   (381)    
Purchase of treasury stock, shares   (13,206)      
Issuance of 32,000, 33,000 and 38,100 shares of restricted stock (Net of forfeitures - 1,080, 2,620 and 3,220) for the period ended 2017, 2018 and 2019 respectively 47 $ (813) 334 526  
Issuance of 32,000, 33,000 and 38,100 shares of restricted stock (Net of forfeitures - 1,080, 2,620 and 3,220) for the period ended 2017, 2018 and 2019 respectively, Shares   34,880      
Stock-based compensation expense 1,088 $ 1,088      
Cash dividends declared - 0.50, 0.56 and 0.61 per share for the period ended 2017, 2018 and 2019 respectively (6,734)     (6,734)  
Ending balance at Dec. 31, 2019 $ 230,258 $ 81,535 $ (12,456) $ 160,081 $ 1,098
Ending balance, shares at Dec. 31, 2019   11,136,935