Income Tax (Summary Of The Activity Related To Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax [Abstract]
Unrecognized tax benefits – gross beginning balance	$ 3,760	$ 2,160	$ 2,171
Gross increases - prior period tax provisions	6,679	1,600	(11)
Gross increases – current period tax positions	583
Unrecognized tax benefits – gross ending balance	$ 11,022	$ 3,760	$ 2,160