Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,213	$ 2,213
Accumulated Amortization	(512)	(133)
Net Carrying Amount	$ 1,701	2,080
Core deposit intangible [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years
Gross Carrying Amount	$ 2,213	2,213
Accumulated Amortization	(512)	(133)
Net Carrying Amount	$ 1,701	$ 2,080