Income Taxes (Summary of Uncertain Tax Positions Included in Income Tax Provision) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Taxes [Abstract]
Current (provision) benefit for UTPs	$ (690)	$ (627)	$ (1,365)	$ (1,138)
Deferred benefit (provision) for UTPs	231	320	475	512
Tax (provision) benefit for UTPs	$ (459)	$ (307)	$ (890)	$ (626)