Investments in Loans (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Commercial Real Estate Loans
Delinquency Status, Total	$ 60,405	$ 30,677
30 to 59 days [Member]
Commercial Real Estate Loans
Delinquency Status, Total	2,500	3,500
60 to 89 days [Member]
Commercial Real Estate Loans
Delinquency Status, Total	3,850	0
90 days or more [Member]
Commercial Real Estate Loans
Delinquency Status, Total	41,830	16,857
In foreclosure or bankruptcy proceedings [Member]
Commercial Real Estate Loans
Delinquency Status, Total	$ 12,225	$ 10,320

Amount of principal due on loans that have been delinquent, which may exclude loans having interest delinquent for three months or less, 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 210.12-29.10(a))

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

Reference 2: 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

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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5

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