Loans Receivable, net - Loans Receivables, Net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 232,665	$ 242,127
Adjusted by:
Deferred capitalized costs, net	239	277
Loan loss reserves	(2,852)	(3,413)
Loans receivable, net	230,052	238,991
Commercial mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial mortgage loans	114,745	128,401
SBIC commercial mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
SBIC commercial mortgage loans	54,044	47,621
SBA 7(a) loans, subject to secured borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
SBA 7(a) loans, subject to secured borrowings	35,213	37,909
SBA 7(a) Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
SBA 7(a) loans	$ 28,663	$ 28,196