Share-Based Compensation (Summary of Unvested Stock Options Activity) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning balance (in shares)	200
Granted (in shares)	0
Vested (in shares)	(100)
Forfeited (in shares)	0
Unvested, ending balance (in shares)	100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested, beginning balance (in dollars per share)	$ 2.88
Granted (in dollars per share)		$ 0.00
Vested (in dollars per share)	2.88
Forfeited (in dollars per share)	0.00
Unvested, ending balance (in dollars per share)	$ 2.88