Schedule IV - Real Estate Mortgage Loans (Details) (USD $)	12 Months Ended
Dec. 31, 2014 loan
First Mortgages \| Florida
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	1,000
Interest rate	9.75%
Monthly debt service	$ 50,000
Face value	5,564,000
Net book value	5,249,000
First Mortgages \| Washington \| 8.00% Fixed Rate Loans due 2020
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	1,000
Interest rate	8.00%
Monthly debt service	167,000
Face value	25,000,000
Net book value	24,795,000
First Mortgages \| Washington \| 6.00% Fixed Rate Loans due 2017
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	1,000
Interest rate	6.00%
Monthly debt service	44,000
Face value	6,335,000
Net book value	6,208,000
First Mortgages \| Multiple \| 8.93% Variable Rate Loans due 2017
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	27,000
Interest rate	8.93%
Monthly debt service	577,000
Face value	83,107,000
Net book value	83,107,000
First Mortgages \| Multiple \| 9.21% Variable Rate Loans due 2019
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	3,000
Interest rate	9.21%
Monthly debt service	131,000
Face value	17,023,000
Net book value	17,023,000
First Mortgages \| California
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	11,000
Interest rate	9.42%
Monthly debt service	1,627,000
Face value	179,495,000
Net book value	174,790,000
First Mortgages \| Texas
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	1,000
Interest rate	9.00%
Monthly debt service	13,000
Face value	419,000
Net book value	0
Second Mortgages \| Multiple
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	9,000
Interest rate	10.50%
Monthly debt service	45,000
Face value	5,000,000
Net book value	4,959,000
Aggregate commitment	215,000,000
Mezzanine Loans \| Multiple
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	217,000
Interest rate	8.14%
Monthly debt service	2,953,000
Face value	421,268,000
Net book value	421,268,000
Prior liens	2,191,230,000
Mezzanine Loans \| Virginia
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	1,000
Interest rate	10.00%
Monthly debt service	16,000
Face value	3,131,000
Net book value	3,131,000
Construction Loans \| Colorado
Mortgage Loans on Real Estate [Line Items]
Number of RE assets	1,000
Interest rate	8.75%
Monthly debt service	4,000
Face value	1,114,000
Net book value	$ 229,000

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

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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12

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 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

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

+ References

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

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- Definition

Indicates the number of mortgages under each classification.

+ References

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 210.12-29.3)

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

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

-Paragraph 3

-Article 12

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- Definition

Amount of prior lien on the real estate that secures the mortgage loan.

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- Definition

Mortgage Loans On Real Estate, Aggregate Commitment Of Mortgages

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No definition available.

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- Definition

Mortgage Loans on Real Estate, Monthly Debt Service Amount

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