Loans Receivable, net - Loan Loss Reserves (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	$ 3,413	$ 1,812
Provision for loan losses	960	1,203
Reduction of loan losses	(398)	(149)
Recoveries		(408)
Principal balances written-off	(1,123)	(391)
Balance, end of period	2,852	2,067
Commercial Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	2,850	1,329
Provision for loan losses	767	1,103
Reduction of loan losses	(395)	(115)
Recoveries		(408)
Principal balances written-off	(988)	(219)
Balance, end of period	2,234	1,690
SBA 7(a) Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of year	563	483
Provision for loan losses	193	100
Reduction of loan losses	(3)	(34)
Recoveries
Principal balances written-off	(135)	(172)
Balance, end of period	$ 618	$ 377