Income Taxes Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Unrecognized Tax Benefits	$ 41,218	$ 32,536	$ 34,635	$ 40,888
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	2,082	10,361	919
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	0	(17,107)	(8,284)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	6,703	8,841	3,765
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0	(4,194)	(1,524)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ (103)	$ 0	$ (1,129)