Schedule IV - Mortgage Loans on Real Estate (Details 1) $ in Thousands	12 Months Ended
Dec. 31, 2015 USD ($)
127 West 23rd Investors, LLC
Mortgage Loans on Real Estate
Interest Rate	7.00%
Final Maturity Date	Aug. 31, 2016
Fair Value	$ 12,600
Carrying Amount	$ 12,600
1185 Broadway LLC
Mortgage Loans on Real Estate
Interest Rate	10.00%
Final Maturity Date	Jan. 31, 2016
Fair Value	$ 31,444
Carrying Amount	$ 31,444

Stated maturity date of the mortgage loan receivable on real estate, in CCYY-MM-DD format.

Reference 1: 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 2: 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

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- Definition

The carrying amount of the outstanding balance due under the mortgage loan.

+ References

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- Definition

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

+ References

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

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- Definition

The stated interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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