Real Estate and Mortgage Notes Receivable Investments (Details 1) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Summary of the Company's mortgage loans
Principal Balance	$ 122,849	$ 37,029
Unamortized Fees	246	430
Total	122,603	36,599
Construction mortgage loans [Member]
Summary of the Company's mortgage loans
Principal Balance	61,551	18,409
Unamortized Fees	246	430
Total	61,305	17,979
Other mortgage loans [Member]
Summary of the Company's mortgage loans
Principal Balance	61,298	18,620
Unamortized Fees	0	0
Total	$ 61,298	$ 18,620

Total carrying amount of mortgage loans as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29.6)
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph c
-Subparagraph Schedule IV
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 29
-Article 12

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule IV)
-URI http://asc.fasb.org/extlink&oid=6882300&loc=d3e5864-122674

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant