Other Real Estate Owned, Net - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Property	Dec. 31, 2015 USD ($) Property	Apr. 30, 2015 USD ($)
Other Real Estate [Line Items]
No. of Properties	14	16
Other assets
Other Real Estate [Line Items]
Properties marketed for sale, value | $			$ 403
Residential
Other Real Estate [Line Items]
Residential properties collateralized with loan	0
No. of Properties	2	3
Residential | Other assets
Other Real Estate [Line Items]
Properties marketed for sale, value | $	$ 708	$ 708
No. of Properties	1	1