Loans - Summary of Troubled Debt Restructurings at the Dates (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable Modifications Number Of Contracts [Line Items]    
Total TDRs on accrual status $ 4,086 $ 6,836
Total TDRs on non-accrual status 15,490 10,797
Total TDRs 19,576 17,633
One-to Four-Family [Member]
   
Financing Receivable Modifications Number Of Contracts [Line Items]    
Total TDRs on accrual status 2,588 1,992
Total TDRs on non-accrual status 1,500 2,493
Multi-Family Residential Real Estate [Member]
   
Financing Receivable Modifications Number Of Contracts [Line Items]    
Total TDRs on accrual status 109 110
Home Equity Lines of Credit [Member]
   
Financing Receivable Modifications Number Of Contracts [Line Items]    
Total TDRs on accrual status 21 22
Commercial Real Estate [Member]
   
Financing Receivable Modifications Number Of Contracts [Line Items]    
Total TDRs on accrual status 1,368 1,393
Total TDRs on non-accrual status 4,309 4,466
Construction [Member]
   
Financing Receivable Modifications Number Of Contracts [Line Items]    
Total TDRs on accrual status    3,319
Total TDRs on non-accrual status 9,489 3,838
Commercial Business Loans [Member]
   
Financing Receivable Modifications Number Of Contracts [Line Items]    
Total TDRs on non-accrual status $ 192