Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Accumulated Depreciation - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, beginning of period	$ (2,242,345)	$ (1,904,311)	$ (1,538,329)
Additions (depreciation expense)	(440,002)	(418,407)	(377,577)
Disposals	7,396	16,038	12,804
Foreign currency transaction adjustments and others	79,303	64,335	(1,209)
Balance, end of year	$ (2,595,648)	$ (2,242,345)	$ (1,904,311)