Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes Disclosure [Line Items]
Non-recognized benefit on foreign investments	$ 2,980,000	$ 847,000	$ 2,980,000
Foreign tax assets valuation allowance	$ 4,300,000	1,230,000	4,300,000
Net Operating Loss		39,360,000
Current income tax receivable		36,800,000
Claim of bonus tax depreciation		29,221,000	$ 61,781,000	$ 0
Uncertain tax positions		$ 153,000