Fair Value - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Long term assets	$ 1,800,000	$ 0
Current liability in accounts payable, accrued expenses and other current liabilities	3,700,000	11,000,000
Long-term liability	0	0
Current assets	0	0
Net gain on derivatives	$ 9,200,000	$ 23,200,000	$ 22,800,000