Real Estate and Other Assets Owned - Presentation of Balances in Other Real Estate and Other Assets Owned and Non-Accrual Loans Consisting Other Non-Performing Loan (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other assets owned	$ 772	$ 1,736	$ 1,795	$ 1,927
Total non-accrual loans	11,523	7,422	7,056
Total non-performing assets	$ 12,295	$ 9,158	$ 8,851
Non-performing assets /Average assets	1.43%	1.02%	1.01%
Multi-Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other assets owned	$ 141
Total non-accrual loans	1,772	$ 1,968	$ 1,827
One-to-Four Family Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other assets owned		55	115	159
Total non-accrual loans	469	2,234	1,456
Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other assets owned	172	943	943	$ 1,768
Total non-accrual loans	8,281	1,553	1,982
Non-Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total other assets owned	459	738	737
Total non-accrual loans	$ 28	$ 247	$ 520