Other Real Estate Owned Net - Summary of Properties Included in Other Real Estate Owned (OREO) (Detail) $ in Thousands	Dec. 31, 2015 USD ($) Property	Dec. 31, 2014 USD ($) Property
Real Estate Properties [Line Items]
No. of Properties | Property	16	27
Carrying Value | $	$ 1,870	$ 2,791
Residential
Real Estate Properties [Line Items]
No. of Properties | Property	3	10
Carrying Value | $	$ 540	$ 1,559
Land lots
Real Estate Properties [Line Items]
No. of Properties | Property	7	13
Carrying Value | $	$ 413	$ 587
Convenience Stores
Real Estate Properties [Line Items]
No. of Properties | Property	2	2
Carrying Value | $	$ 191	$ 234
Restaurant
Real Estate Properties [Line Items]
No. of Properties | Property	1	1
Carrying Value | $	$ 55	$ 107
Commercial properties
Real Estate Properties [Line Items]
No. of Properties | Property	3	1
Carrying Value | $	$ 671	$ 304