Loans - Summary of the Activity in Loans Classified as TDRs (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Beginning Balance	$ 5,536	$ 3,284
New TDR	1,044	2,265
Loss or Foreclosure	0	0
Loan Amortization	(43)	(13)
Removed from (Taken to) Non-accrual	0	0
Ending Balance	6,537	5,536
Multi-Family [Member]
Financing Receivable, Modifications [Line Items]
New TDR	816
Loss or Foreclosure	0
Removed from (Taken to) Non-accrual	0
Ending Balance	816
Non-Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Beginning Balance	5,536	3,284
New TDR	228	2,265
Loss or Foreclosure	0	0
Loan Amortization	(43)	(13)
Removed from (Taken to) Non-accrual	0	0
Ending Balance	$ 5,721	$ 5,536