Other Real Estate Owned Net - Summary of Properties Included in Other Real Estate Owned (OREO) (Detail) $ in Thousands	Jun. 30, 2015 USD ($) Property	Dec. 31, 2014 USD ($) Property
Real Estate Properties [Line Items]
No. of Properties	19	27
Carrying Value | $	$ 2,624	$ 2,791	[1]
Residential
Real Estate Properties [Line Items]
No. of Properties	7	10
Carrying Value | $	$ 1,407	$ 1,559
Land lots
Real Estate Properties [Line Items]
No. of Properties	7	13
Carrying Value | $	$ 442	$ 587
Convenience Stores
Real Estate Properties [Line Items]
No. of Properties	2	2
Carrying Value | $	$ 234	$ 234
Restaurant
Real Estate Properties [Line Items]
No. of Properties	1	1
Carrying Value | $	$ 107	$ 107
Commercial properties
Real Estate Properties [Line Items]
No. of Properties	2	1
Carrying Value | $	$ 434	$ 304

[1] Derived from the audited consolidated financial statements.