Share-Based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Number of Shares
Options outstanding, beginning balance (in shares)	500,000
Granted (in shares)	0	0
Exercised (in shares)	0
Forfeited (in shares)	0
Options outstanding, ending balance (in shares)	500,000
Options exercisable (in shares)	300,000
Weighted Average Exercise Price per Share
Options outstanding, beginning balance (in dollars per share)	$ 7.49
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	0.00
Forfeited (in dollars per share)	0.00
Options outstanding, ending balance (in dollars per share)	7.49
Options exercisable (in dollars per share)	$ 7.49
Options outstanding, weighted average remaining contractual term (in years)	6 years 6 months 27 days
Options exercisable, weighted average remaining contractual term (in years)	6 years 6 months 27 days
Options outstanding, aggregate intrinsic value	$ 1,705
Options exercisable, aggregate intrinsic value	$ 1,023