Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability Derivatives Fair Value	$ 37,366	$ 19,600
Current maturities on long-term debt	91,850	31,850
Total long-term debt, net	1,546,016	1,548,893
Other Liabilities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability Derivatives Fair Value	$ 37,366	$ 19,600