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Subordinate Loans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Feb. 28, 2013 Subordinate loans [Member] Retail [Member] loan	Jan. 31, 2014 Subordinate loans [Member] Hotel [Member]	Jun. 30, 2013 Mezzanine Loan [Member] Hotel [Member]	Jun. 30, 2014 Mezzanine Loan [Member] Nursing Facility [Member]	Aug. 31, 2014 Mezzanine Loan [Member] Office [Member] office_park
Mortgage Loans on Real Estate [Line Items]
Number of loans	2
Proceeds from collection of loans receivable	$ 50,000	$ 15,000	$ 15,000	$ 47,000	$ 50,000
Proceeds from collection of loans receivable, yield maintenance payment	$ 2,500		$ 1,233
Mortgage loan IRR	15.00%	14.00%	19.00%	12.00%	13.00%
Number of properties					7

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Mortgage Loans on Real Estate, Internal Rate of Return

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Mortgage Loans on Real Estate, Number of Properties in a Portfolio

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Proceeds from Collection of Loans Receivable, Yield Maintenance Payment

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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

The cash inflow associated with the collection, including prepayments, of loans receivable issued for financing of goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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