Share-Based Compensation (Summary of Grant Date Fair Value of Awards) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options	$ 633	$ 1,279	$ 3,507	$ 2,059
Restricted stock	1,582	1,043	4,182	2,942
Total	$ 2,215	$ 2,322	$ 7,689	$ 5,001