Net Investments in Properties and Real Estate Under Construction (Details 3) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Long Lived Assets Held-for-sale
Assets held for sale	$ 13,771	$ 0
Operating real estate
Long Lived Assets Held-for-sale
Assets held for sale	$ 13,771	$ 0

Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6390208&loc=d3e400-110220

Name:	us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant