Real Estate and Lending Activities - Summary of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Loans [Line Items]
Loans Receivable Net	$ 529,895	$ 527,893
Mortgage loans
Loans [Line Items]
Loans Receivable Net	368,650	368,650
Acquisition loans
Loans [Line Items]
Loans Receivable Net	103,516	98,433
Working capital and other loans
Loans [Line Items]
Loans Receivable Net	54,377	57,458
Convertible loan
Loans [Line Items]
Loans Receivable Net	$ 3,352	$ 3,352

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph a

-Article 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(a))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant