Fair Value Disclosures - Additional Information (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long term debt	$ 4,057,594,000	$ 4,017,656,000
Property and equipment Measured on non-recurring base, carrying value	356,667,000	364,896,000
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment Measured on non-recurring base, carrying value	3,700,000
Property and equipment Measured on non-recurring basis, fair value	0
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	1,698,500,000	1,705,600,000
Long term debt	1,600,000,000	1,600,000,000
Senior Secured Term Loan Facilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	2,443,300,000	2,455,100,000
Long term debt	$ 2,407,600,000	$ 2,417,700,000