Real Estate and Lending Activities - Summary of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Loans [Line Items]
Loans Receivable Net	$ 526,603	$ 527,893
Mortgage loans
Loans [Line Items]
Loans Receivable Net	368,650	368,650
Acquisition loans
Loans [Line Items]
Loans Receivable Net	98,433	98,433
Working capital and other loans
Loans [Line Items]
Loans Receivable Net	56,168	57,458
Convertible loan
Loans [Line Items]
Loans Receivable Net	$ 3,352	$ 3,352

Total of loans held-for-sale and held-in-portfolio net of unearned income, allowance for loan and lease losses, if any, unamortized loan origination and other fees and costs, and purchased premiums or discounts.

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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