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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid In Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income [Member]
BALANCE at Dec. 31, 2016 $ 153,977 $ 321 $ 158,581 $ 7,294 $ (12,219)  
BALANCE, Shares at Dec. 31, 2016   32,135,176        
BALANCE, Treasury Shares at Dec. 31, 2016         (650,402)  
Net income 18,337     18,337    
Issuance of Common Stock for Acquisition, Value 10,859 $ 3 10,856      
Issuance of Common Stock for Acquisition, Shares   282,577,000        
Issuance of Common Stock Awards to Employees, Value   $ 1 (1)      
Issuance of Common Stock Awards to Employees, Shares   101,241        
Surrender of Common Stock Awards by Employees, Value (550)       $ (550)  
Surrender of Common Stock Awards by Employees, Shares         (11,587)  
Share-Based Compensation Expense 2,270   2,270      
Share-Based Compensation issued to Directors, Value 300   300      
Share-Based Compensation issued to Directors, Shares   5,940        
Other Comprehensive Income, Net of Tax (77)         $ (77)
BALANCE at Jun. 30, 2017 185,116 $ 325 172,006 25,631 $ (12,769) (77)
BALANCE, Shares at Jun. 30, 2017   32,524,934        
BALANCE, Treasury Shares at Jun. 30, 2017         (661,989)  
BALANCE at Dec. 31, 2017 $ 210,528 $ 325 174,043 48,434 $ (12,781) 507
BALANCE, Shares at Dec. 31, 2017 32,524,934          
BALANCE, Treasury Shares at Dec. 31, 2017 (662,788) 32,524,934     (662,788)  
Net income $ 22,709     22,709    
Cumulative Effect of Accounting Changes, Net of Tax 2,888     2,776   112
Issuance of Common Stock Awards to Employees, Value   $ 2 (2)      
Issuance of Common Stock Awards to Employees, Shares   194,093        
Surrender of Common Stock Awards by Employees, Value (2,282)       $ (2,282)  
Surrender of Common Stock Awards by Employees, Shares         (42,118)  
Share-Based Compensation Expense 4,200   4,200      
Share-Based Compensation issued to Directors, Value 25   25      
Share-Based Compensation issued to Directors, Shares   4,945,000        
Common Stock Repurchase,Value (24,640)       $ (24,640)  
Common Stock Repurchase , Shares         (412,717)  
Other Comprehensive Income, Net of Tax 1,635         1,635
BALANCE at Jun. 30, 2018 $ 215,063 $ 327 $ 178,266 $ 73,919 $ (39,703) $ 2,254
BALANCE, Shares at Jun. 30, 2018 32,723,972 32,723,972        
BALANCE, Treasury Shares at Jun. 30, 2018 (1,117,623)       (1,117,623)