Accumulated Other Comprehensive Loss, Net (Schedule Of Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Foreign currency translation adjustments [Member]	Mar. 31, 2013 Unrealized losses on interest rate swap contracts [Member]		Dec. 31, 2012 Unrealized losses on interest rate swap contracts [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net, beginning balance	$ (105,085)		$ (24,634)	$ (80,451)	[1]
Other comprehensive loss before reclassification	(4,667)		(4,040)	(627)	[2]
Amounts reclassified from accumulated other comprehensive loss, net	6,330			6,330	[2]
Other comprehensive income (loss)	1,663	(4,478)	(4,040)	5,703
Accumulated other comprehensive loss, net, ending balance	(103,422)		(28,674)	(74,748)	[1]
Accumulated other comprehensive income (loss), tax expense (benefit)				23,977		27,412
Other comprehensive loss before reclassification - interest rate swap contracts, tax benefit	(378)
Amounts reclassified from AOCI - interest rate swap contracts, tax expense	$ 3,814

[1] Net of income tax benefit of $23,977 and $27,412 as of March 31, 2013 and December 31, 2012, respectively.

[2] Net of income tax (benefit) expense of $(378) and $3,814 for the other comprehensive loss before reclassification and the amounts reclassified from accumulated other comprehensive loss, net, respectively.