Income Taxes (Schedule Of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current provision (benefit), Federal									$ 15,277	$ (6,137)	$ 3,872
Current provision (benefit), State and local									502	2,145	34
Current provision (benefit), Foreign									3,438	873	2,566
Total current provision (benefit)									19,217	(3,119)	6,472
Deferred provision (benefit), Federal									41,087	41,832	45,920
Federal net operating loss									14,522	14,369	11,166
Deferred provision (benefit), State and local									4,207	5,608	5,270
Deferred provision, State and local, tax rate change									(5,374)	0	0
Deferred provision (benefit), Foreign									(1)	(3,478)	(2,420)
Total deferred provision									54,441	58,331	59,936
Income tax provision	$ (1,579)	$ 31,807	$ 37,101	$ 6,329	$ 9,669	$ 22,821	$ 19,952	$ 2,770	$ 73,658	$ 55,212	$ 66,408