Income Taxes (Changes In Gross Liability For Unrecognized Tax Benefits Excluding Interest And Penalties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of period	$ 64,200	$ 63,057
Increase in unrecognized tax benefits for tax positions taken in a prior period	9,149	900
Decrease in unrecognized tax benefits for tax positions taken in a prior period	(1,993)	(4,989)
Increase in unrecognized tax benefits for tax positions taken in the current period	6,302	5,876
Statute lapses	(2,465)	0
Settlements with taxing authorities	(2,093)	(644)
Unrecognized tax benefits, end of period	$ 73,100	$ 64,200