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Stockholders’ Equity and Earnings (Loss) per Share (Narrative) (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Common stock, par value (usd per share) $ 0.01   $ 0.01   $ 0.01
Treasury stock, number of shares held (in shares) 218,170   218,170   213,803
Shares authorized (in shares) 100,000,000   100,000,000   100,000,000
Equity Option          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities (in shares) 800,700 948,803 800,700 963,196  
Restricted stock units (RSUs)          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities (in shares) 1,367,823 1,077,663 1,367,823 1,277,583  
Common Stock          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Shares outstanding (in shares) 37,807,467   37,807,467   37,617,920
Restricted stock          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Number of shares of restricted stock (in shares) 128,205   128,205   147,368