Restructuring Activities (Schedule Of Restructuring Reserve 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 Cost and Reserve [Line Items]
Accrued restructuring as of December 31, 2014				$ 4,859	$ 4,859
Restructuring charges	$ 1,274	$ 981	$ 2,810	3,663	8,728	$ 24,517
Cash payments					(12,402)
Adjustments					(217)
Accrued restructuring as of December 31, 2015	968				968	4,859
Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrued restructuring as of December 31, 2014				3,154	3,154
Restructuring charges					5,472
Cash payments					(8,000)
Accrued restructuring as of December 31, 2015	626				626	3,154
Lease/Contract Exit And Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrued restructuring as of December 31, 2014				1,401	1,401
Restructuring charges					2,623
Cash payments					(3,807)
Adjustments					(217)
Accrued restructuring as of December 31, 2015	0				0	1,401
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Accrued restructuring as of December 31, 2014				$ 304	304
Restructuring charges					633
Cash payments					(595)
Accrued restructuring as of December 31, 2015	$ 342				$ 342	$ 304