Loans Receivable, net - Component of Impaired loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Financing Receivable, Modifications [Line Items]
Average impaired loans	$ 13,195	$ 8,221	$ 13,120	$ 8,237
Interest income on impaired loans	101	98	210	187
Commercial Mortgage Loans [Member]
Financing Receivable, Modifications [Line Items]
Average impaired loans	11,442	7,731	11,621	7,726
Interest income on impaired loans	84	96	173	182
SBA 7(a) Loans [Member]
Financing Receivable, Modifications [Line Items]
Average impaired loans	1,753	490	1,499	511
Interest income on impaired loans	$ 17	$ 2	$ 37	$ 5