Schedule III-Real Estate and Accumulated Depreciation (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Real Estate Subject To Operating Lease
Rollforward of Carrying Amounts of Real Estate Investments
Balance at beginning of year	$ 1,500,151	$ 930,404	$ 326,507
Acquisitions	513,407	531,795	610,795
Dispositions	(56,200)	(10,142)	0
Foreign currency translation adjustment	15,468	(25,664)	(6,898)
Reclassification From Real Estate Under Construction	140,324	73,758
Reclassification to direct financing lease	(7,378)
Balance at close of year	2,105,772	1,500,151	930,404
Rollforward of Accumulated Depreciation of Real Estate Investments
Balance at beginning of year	40,522	16,274	5,957
Depreciation Expense	37,265	25,046	10,484
Dispositions	(447)	(7)
Foreign currency translation adjustment	625	(791)	(167)
Reclassification to direct financing lease	(720)
Balance at close of year	77,245	40,522	16,274
Operating Real Estate
Rollforward of Carrying Amounts of Real Estate Investments
Balance at beginning of year	178,141	12,177	0
Acquisitions	77,203	165,964	12,177
Write-off of fully depreciated asset	(539)
Balance at close of year	254,805	178,141	12,177
Rollforward of Accumulated Depreciation of Real Estate Investments
Balance at beginning of year	2,745	300	0
Depreciation Expense	5,551	2,445	300
Write-off of fully depreciated asset	(539)
Balance at close of year	$ 7,757	$ 2,745	$ 300