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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Preferred Stock [Member]
Common Stock [Member]
Retained Earnings [Member]
Stock in rabbit trust assumed in acquisition [Member]
Rabbi trust obligation [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total
Beginning balance at Dec. 31, 2014 $ 70,787 $ 132,532 $ 184,958 $ (578) $ 387,699
Beginning balance, shares at Dec. 31, 2014   19,710         19,709,881
Net income     27,034       $ 27,034
Cash dividends declared ($0.32 per common share)     (6,329)       (6,329)
Preferred stock redeemed (Series B) (63,500)           (63,500)
Preferred stock dividends     (603)       (603)
Stock option exercises   $ 112         112
Stock option exercises, shares   7          
Stock withheld for payment of taxes   $ (54)         (54)
Stock withheld for payment of taxes, shares   (3)          
Stock-based compensation   $ 803         803
Stock-based compensation, shares   34          
Other comprehensive income (loss)           (2,972) (2,972)
Ending balance at Dec. 31, 2015 7,287 $ 133,393 205,060 (3,550) $ 342,190
Ending balance, shares at Dec. 31, 2015   19,748         19,747,509
Net income     27,509       $ 27,509
Cash dividends declared ($0.32 per common share)     (6,473)       (6,473)
Preferred stock dividends     (175)       (175)
Conversion of preferred stock to common stock (7,287) $ 7,287        
Conversion of preferred stock to common stock, shares   729          
Equity issued pursuant to acquisitions   $ 5,509         5,509
Equity issued pursuant to acquisitions, shares   279          
Stock option exercises   $ 375         375
Stock option exercises, shares   23          
Stock withheld for payment of taxes   $ (166)         (166)
Stock withheld for payment of taxes, shares   (6)          
Stock-based compensation   $ 889         889
Stock-based compensation, shares   72          
Other comprehensive income (loss)           (1,557) (1,557)
Ending balance at Dec. 31, 2016 $ 147,287 225,921 (5,107) $ 368,101
Ending balance, shares at Dec. 31, 2016   20,845         20,844,505
Net income     45,972       $ 45,972
Cash dividends declared ($0.32 per common share)     (8,298)       (8,298)
Equity issued pursuant to acquisitions   $ 284,192   (7,688) 7,688   284,192
Equity issued pursuant to acquisitions, shares   8,733          
Payment of deferred fees       4,107 (4,107)  
Stock option exercises   $ 287         287
Stock option exercises, shares   18          
Stock withheld for payment of taxes   $ (231)         (231)
Stock withheld for payment of taxes, shares   (7)          
Stock-based compensation   $ 1,259         1,259
Stock-based compensation, shares   50          
Reclassification of accumulated other comprehensive income due to statutory tax changes     736     (736)
Other comprehensive income (loss)           1,697 1,697
Ending balance at Dec. 31, 2017 $ 432,794 $ 264,331 $ (3,581) $ 3,581 $ (4,146) $ 692,979
Ending balance, shares at Dec. 31, 2017   29,639         29,639,374