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Significant Accounting Policies - EPS (Details) - $ / shares
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of reconciliation of shares used to calculate basic and diluted earnings per share              
Common stock, shares authorized 32,000,000       32,000,000 32,000,000  
Common stock, par value $ 0.01       $ 0.01 $ 0.01  
Common stock, shares issued 21,743,498       21,743,498 11,167,425  
Common stock, shares outstanding 21,743,498       21,743,498 11,167,425  
Preferred stock, shares authorized 8,000,000       8,000,000 8,000,000  
Preferred stock, shares issued 0       0 0  
Preferred stock, shares outstanding 0       0 0  
Dividends declared, per share $ 0.50 $ 0.50 $ 0.25 $ 0.25 $ 0.50    
Dividends paid, per share $ 0.50 $ 0.50 $ 0.25 $ 0.25      
Antidilutive stock options         611,000 0 0
Weighted average shares outstanding used to compute basic earnings per share         15,190,000 10,678,000 10,610,000
Incremental shares issuable upon the assumed exercise of stock options           39,000 5,000
Unvested restricted stock and restricted stock units           482,000 230,000
Shares used to compute diluted earnings (loss) per share         15,190,000 11,199,000 10,845,000