Share-Based Compensation (Summary of Unvested Stock Options Activity) (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning balance (in shares) | shares	300
Granted (in shares) | shares	0
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Unvested, ending balance (in shares) | shares	300
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) | $ / shares	$ 2.88
Granted (in dollars per share) | $ / shares	0.00
Vested (in dollars per share) | $ / shares	0.00
Forfeited (in dollars per share) | $ / shares	0.00
Unvested, ending balance (in dollars per share) | $ / shares	$ 2.88