Real Estate and Other Assets Owned - Summary of Activity in Company's Real Estate and Other Assets Owned (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 1,927	$ 1,674
Foreclosures	843	1,579
Proceeds/Sales	(318)	(1,118)
Reduction in Values		(162)
Gain (Loss) on Sale	(716)	(46)
Ending balance	1,736	1,927
One-to-Four Family Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	159	350
Foreclosures	105	461
Proceeds/Sales	(194)	(667)
Reduction in Values		(5)
Gain (Loss) on Sale	(15)	20
Ending balance	55	159
Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	1,768	1,124
Foreclosures		943
Proceeds/Sales	(124)	(123)
Reduction in Values		(157)
Gain (Loss) on Sale	(701)	(19)
Ending balance	943	1,768
Non-Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance		200
Foreclosures	738	175
Proceeds/Sales		(328)
Gain (Loss) on Sale		$ (47)
Ending balance	$ 738