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