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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Preferred Stock
Common Stock
Additional Paid-In Capital
Retained Earnings
Treasury Stock
Beginning balance (in shares) at Dec. 31, 2018   0 13,005     0
Beginning balance at Dec. 31, 2018 $ 259,232 $ 0 $ 130 $ 107,760 $ 151,342 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of common stock options (in shares)     57      
Exercise of common stock options 555     555    
Compensation expense on common stock options 31     31    
Issuance of restricted stock (in shares)     71      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 464   $ 1 463    
Taxes paid related to net shares settlement of equity awards (192)     (192)    
Net income (loss) 98       98  
Ending balance (in shares) at Mar. 31, 2019   0 13,133     0
Ending balance at Mar. 31, 2019 260,188 $ 0 $ 131 108,617 151,440 $ 0
Beginning balance (in shares) at Dec. 31, 2018   0 13,005     0
Beginning balance at Dec. 31, 2018 259,232 $ 0 $ 130 107,760 151,342 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) (12,154)          
Ending balance (in shares) at Sep. 30, 2019   0 13,142     (38)
Ending balance at Sep. 30, 2019 248,690 $ 0 $ 131 109,861 139,188 $ (490)
Beginning balance (in shares) at Mar. 31, 2019   0 13,133     0
Beginning balance at Mar. 31, 2019 260,188 $ 0 $ 131 108,617 151,440 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of common stock options (50)     (50)    
Compensation expense on common stock options 30     30    
Issuance of restricted stock (in shares)     5      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 612     612    
Taxes paid related to net shares settlement of equity awards 9     9    
Net income (loss) 327       327  
Ending balance (in shares) at Jun. 30, 2019   0 13,138     0
Ending balance at Jun. 30, 2019 261,116 $ 0 $ 131 109,218 151,767 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense on common stock options 32     32    
Issuance of restricted stock (in shares)     4      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 611     611    
Net income (loss) (12,579)       (12,579)  
Purchase of treasury shares (in shares)           38
Purchase of treasury shares (490)         $ (490)
Ending balance (in shares) at Sep. 30, 2019   0 13,142     (38)
Ending balance at Sep. 30, 2019 248,690 $ 0 $ 131 109,861 139,188 $ (490)
Beginning balance (in shares) at Dec. 31, 2019   0 13,178     (38)
Beginning balance at Dec. 31, 2019 247,693 $ 0 $ 132 110,573 137,478 $ (490)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense on common stock options 17     17    
Issuance of restricted stock (in shares)     95      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 486   $ 1 485    
Taxes paid related to net shares settlement of equity awards (149)     (149)    
Net income (loss) 4,082       4,082  
Ending balance (in shares) at Mar. 31, 2020   0 13,273     (38)
Ending balance at Mar. 31, 2020 252,129 $ 0 $ 133 110,926 141,560 $ (490)
Beginning balance (in shares) at Dec. 31, 2019   0 13,178     (38)
Beginning balance at Dec. 31, 2019 247,693 $ 0 $ 132 110,573 137,478 $ (490)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 3,685          
Ending balance (in shares) at Sep. 30, 2020   0 13,290     (38)
Ending balance at Sep. 30, 2020 252,858 $ 0 $ 133 112,052 141,163 $ (490)
Beginning balance (in shares) at Mar. 31, 2020   0 13,273     (38)
Beginning balance at Mar. 31, 2020 252,129 $ 0 $ 133 110,926 141,560 $ (490)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense on common stock options 1     1    
Issuance of restricted stock (in shares)     13      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 562     562    
Net income (loss) 165       165  
Ending balance (in shares) at Jun. 30, 2020   0 13,286     (38)
Ending balance at Jun. 30, 2020 252,857 $ 0 $ 133 111,489 141,725 $ (490)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Compensation expense on common stock options 1     1    
Issuance of restricted stock (in shares)     4      
Issuance of restricted stock 0          
Compensation expense on restricted common stock 562     562    
Net income (loss) (562)       (562)  
Ending balance (in shares) at Sep. 30, 2020   0 13,290     (38)
Ending balance at Sep. 30, 2020 $ 252,858 $ 0 $ 133 $ 112,052 $ 141,163 $ (490)