Restructuring Activities (Schedule Of Restructuring Costs By Type) (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Severance costs					$ 5,472	$ 12,500
Lease / contract exit and related costs					2,623	4,251
Other					633	7,766
Total restructuring charges	$ 1,274	$ 981	$ 2,810	$ 3,663	$ 8,728	$ 24,517