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Earnings (Loss) Per Share and Stockholders' Equity (Schedule of Antidilutive Securities Excluded from Computation of Earnings (Loss) Per Share) (Details) - Stock Options [Member] - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of shares 1,002,391 1,061,541 1,002,391 1,061,541
Minimum [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Range of exercise prices $ 24.79 $ 24.79 $ 24.79 $ 24.79
Maximum [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Range of exercise prices $ 24.79 $ 24.79 $ 24.79 $ 24.79