Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt, current	$ 17,514	$ 19,001
Term Facility, non-current	1,694,585	1,840,510
Total long term debt	1,712,099	1,859,511
Senior Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt, current	17,514	19,001
Term Facility, non-current	$ 1,694,585	$ 1,840,510