Share-Based Compensation (Summary of Grant Date Fair Value of Awards) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options	$ 53	$ 121	$ 12,633	$ 3,628
Restricted stock	18	0	3,379	4,182
Total	$ 71	$ 121	$ 16,012	$ 7,810