Loans Receivable, net - Component of Impaired loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Modifications [Line Items]
Average impaired loans	$ 9,783	$ 9,885	$ 11,910	$ 8,788
Interest income on impaired loans	112	88	322	277
Commercial Mortgage Loans [Member]
Financing Receivable, Modifications [Line Items]
Average impaired loans	8,775	8,799	10,676	8,083
Interest income on impaired loans	110	84	283	266
SBA 7(a) Loans [Member]
Financing Receivable, Modifications [Line Items]
Average impaired loans	1,008	1,086	1,234	705
Interest income on impaired loans	$ 2	$ 4	$ 39	$ 11