Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis

	Level I		Level II		Level III		Total
At December 31, 2012:
Assets:
Cash equivalents(a)	$	487,900	$	—	$	—	$	487,900
Liabilities:
Interest rate swap contracts	$	—	$	22,137	$	—	$	22,137
At December 31, 2011:
Assets:
Cash equivalents(a)	$	202,276	$	—	$	—	$	202,276
Liabilities:
Interest rate swap contracts	$	—	$	19,091	$	—	$	19,091

(a) Represents the Company’s investment in funds that invest primarily in money market securities.

Carrying Values And Fair Values Of The Company's Financial Instruments

	December 31, 2012
	Carrying Amount		Estimated Fair Value
Debt instruments:
Senior Secured Credit Facility	$	876,358	$	876,154
Senior Notes	1,276,957		1,404,500
	$	2,153,315	$	2,280,654
	December 31, 2011
	Carrying Amount		Estimated Fair Value
Debt instruments:
Senior Secured Credit Facility	$	1,604,846	$	1,550,960
Senior Notes	686,434		761,250
	$	2,291,280	$	2,312,210