Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance, beginning of period	$ (3,980,198)	$ (3,175,972)	$ (2,595,648)
Additions (depreciation expense)	(882,848)	(748,942)	(618,970)
Disposals	261,928	65,922	9,401
Foreign currency transaction adjustments and others	84,102	(121,206)	29,245
Balance, end of year	$ (4,517,016)	$ (3,980,198)	$ (3,175,972)