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Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($)
$ in Thousands
Dividends Paid to Shareholders [Member]
Common Stock [Member]
Dividends Paid to Shareholders [Member]
Additional Paid-in Capital [Member]
Dividends Paid to Shareholders [Member]
Retained Earnings [Member]
Dividends Paid to Shareholders [Member]
Treasury Stock [Member]
Dividends Paid to Shareholders [Member]
AOCI Attributable to Parent [Member]
Dividends Paid to Shareholders [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2016             5,708,223          
Balance at Dec. 31, 2016             $ 59 $ 17,669 $ 511,776 $ (74,547) $ (446) $ 454,511
Net income             33,215 33,215
Changes in pension, net of tax             2 2
Equity-based compensation (in shares)                      
Equity-based compensation             2,427 2,427
Issuance of restricted stock awards, net of forfeitures (in shares)             16,769          
Issuance of restricted stock awards, net of forfeitures            
Repurchase of common stock (in shares)             (700)         (700)
Repurchase of common stock             (399) $ (399)
Withholding tax for restricted stock awards (in shares)             (517)         (517)
Withholding tax for restricted stock awards             (331) $ (331)
Dividends paid to stockholders $ (8,579) $ (8,579)            
Balance (in shares) at Mar. 31, 2017             5,723,775          
Balance at Mar. 31, 2017             $ 59 $ 20,096 $ 536,412 $ (75,277) $ (444) $ 480,846