Schedule III-Real Estate and Accumulated Depreciation (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Real estate subject to operating leases
Rollforward of Carrying Amounts of Real Estate Investments
Beginning balance	$ 2,506,804	$ 2,331,613	$ 646,482
Additions	2,785,863	216,422	1,776,628
Improvements	18,474	7,422	815
Dispositions	(137,018)	(8,347)	(75,548)
Foreign currency translation adjustment	(157,262)	26,729	13,263
Reclassification to assets held for sale	(33,162)	(72,827)	(17,681)
Reclassification from direct financing lease	13,663	13,952	0
Reclassification from real estate under construction	0	2,875	0
Impairment charges	(20,677)	(11,035)	(12,346)
Ending balance	4,976,685	2,506,804	2,331,613
Rollforward of Accumulated Depreciation of Real Estate Investments
Beginning balance	168,076	116,075	118,054
Depreciation expense	112,758	60,470	24,302
Dispositions	(20,740)	(533)	(22,947)
Foreign currency translation adjustment	(5,318)	1,194	358
Relcassification from (to) equity investment, direct financing lease, intangible assets or assets held for sale	(1,149)	(9,130)	(3,692)
Ending Balance	253,627	168,076	116,075
Operating real estate
Rollforward of Carrying Amounts of Real Estate Investments
Beginning balance	6,024	99,703	109,875
Additions	78,423	0	0
Improvements	438	706	295
Dispositions	0	(93,314)	0
Impairment charges	0	(1,071)	(10,467)
Ending balance	84,885	6,024	99,703
Rollforward of Accumulated Depreciation of Real Estate Investments
Beginning balance	882	19,993	17,121
Depreciation expense	3,984	2,242	2,872
Dispositions	0	(21,353)	0
Ending Balance	$ 4,866	$ 882	$ 19,993