Loans Receivable, net - Loans Considered to be Impaired (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Impaired loans requiring reserves	$ 3,748	$ 10,927	$ 7,411
Impaired loans expected to be fully recoverable	4,340	2,244	846
Total impaired loans	8,088	13,171	8,257
Loan loss reserves	1,406	1,535	563
Average impaired loans	11,121	9,895	8,176
Interest income on impaired loans	388	372	290
Commercial Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans requiring reserves	3,725	10,049	7,027
Impaired loans expected to be fully recoverable	4,340	2,123	689
Total impaired loans	8,065	12,172	7,716
Loan loss reserves	1,385	1,382	372
Average impaired loans	10,042	9,116	7,610
Interest income on impaired loans	348	359	271
SBA 7(a) Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans requiring reserves	23	878	384
Impaired loans expected to be fully recoverable		121	157
Total impaired loans	23	999	541
Loan loss reserves	21	153	191
Average impaired loans	1,079	779	566
Interest income on impaired loans	$ 40	$ 13	$ 19