Income Taxes - Income Tax Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal tax at statutory rate	$ (90,938)	$ (100,391)	$ (55,951)
State and local tax (expense) benefit	(3,616)	1,000	(4,895)
Deferred tax assets generated in current year not benefited	(3,777)	(7,643)	(6,246)
Foreign income tax rate differential	(4,072)	26,151	22,016
Non-deductible expenses	(756)	(2,629)	(15,828)
Stock-based compensation expense	(2,308)	(616)	(5,890)
Change in valuation allowance	38,684	(716)	11,995
Foreign financing activities	(17,548)	1,319	(26,708)
Loss on debt extinguishment	0	(1,604)	(8,288)
Gain on divestments	0	0	8,828
Uncertain tax positions reserve	(20,440)	(66)	(9,371)
Tax adjustments related to REIT	32,189	41,973	45,060
Enactment of the US tax reform	0	(6,513)	0
Other, net	4,903	(4,115)	(173)
Provision for income taxes	$ (67,679)	$ (53,850)	$ (45,451)