Subsequent Events - Loan Commitments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
Apr. 30, 2016	Mar. 31, 2016
Subsequent Events
Funding		$ 15,683
Subsequent Event \| Mortgage Loans on Real Estate
Subsequent Events
Remaining loan commitments	$ 5,500
Subsequent Event \| Mortgage Loans on Real Estate \| Before amendment
Subsequent Events
Remaining loan commitments	1,500
Subsequent Event \| Mortgage Loans on Real Estate \| Michigan
Subsequent Events
Face amount of originated mortgages	$ 12,250
Term of mortgage loan receivable	4 years
Funding	$ 7,750
Remaining loan commitments	$ 4,500

Amount of the contractual principal due at the origination of the mortgage loan (face amount).

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)
-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=27047687&loc=d3e5864-122674

Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 29
-Article 12

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