Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Schedule of Financial Assets at Fair Value Recurring Basis and Fair Value Hierarchy

The following tables present information about the Company's financial assets and liabilities measured at fair value on a recurring basis at December 31, 2012 and December 31, 2011, aggregated by the level in the fair value hierarchy within which those measurements fall (amounts in thousands):

			Fair Value Measurement at Reporting Date Using
	Balance as of December 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Available-for-sale securities (a)	$	416	$	416	$	—	$	—
Liabilities
Interest rate swaps	$	23,886	$	—	$	23,886	$	—

			Fair Value Measurement at Reporting Date Using
	Balance as of December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Available-for-sale securities (a)	$	203	$	203	$	—	$	—
Liabilities
Interest rate swaps	$	20,047	$	—	$	20,047	$	—

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(a) Available-for-sale securities are included in other assets in the accompanying Consolidated Balance Sheets.

Schedule of Long-Term Debt, Carrying Values and Estimated Fair Values

The following table presents information about the estimated fair value of the Company's long-term debt compared with its carrying value (amounts in millions):

	December 31,
	2012		2011
Aggregate fair value	$	2,140	$	2,082
Aggregate carrying amount	2,074		2,195