Loans Receivable, net - Loans Considered to be Impaired Loans (Parenthetical) (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance of our impaired commercial mortgage loans	$ 12,021,000	$ 12,703,000
SBA 7(a) Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance of our impaired SBA 7(a) loans (excluding the government guaranteed portion)	$ 863,000	$ 362,000

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

Name:	us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant