Fair Value Measurements (Gross Amounts and Fair Value of Debt) (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Term loan
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Gross value	$ 1,838,940	$ 1,838,940
Term loan | Significant Other Observable Inputs (Level 2)
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair value - Level 2	1,287,258	1,360,816
7.75% senior notes:
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Gross value	610,000	610,000
7.75% senior notes: | Significant Other Observable Inputs (Level 2)
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair value - Level 2	$ 254,675	$ 204,350