Net Investments in Properties and Real Estate Under Construction (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Schedule of Investments [Line Items]
CIP balance - beginning of period		$ 71,285	$ 90,176
Foreign currency translation adjustments	8,612	(16,863)	13,515
CIP balance - end of period	74,499	74,499	71,285
Real Estate Under Construction [Member]
Schedule of Investments [Line Items]
Capitalized funds		39,683	121,003
Assets placed into service	(38,675)	(38,675)	(142,085)
Capitalized interest		2,244	2,100
Foreign currency translation adjustments		$ (38)	$ 91

- Definition

Net of tax and reclassification adjustments of the change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity. Also includes the following: gain (loss) on foreign currency forward exchange contracts; foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; and gain (loss) on a derivative instrument or nonderivative financial instrument that may give rise to a foreign currency transaction gain (loss) that has been designated and qualified as a hedging instrument for hedging of the foreign currency exposure of a net investment in a foreign operation.

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