Goodwill and Intangibles - Summary of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 11,056	$ 10,995
Accumulated Amortization	(4,546)	(4,252)
Net Intangible Assets	6,510	6,743
Core deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	4,370	4,370
Accumulated Amortization	(2,741)	(2,605)
Net Intangible Assets	1,629	1,765
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	6,686	6,625
Accumulated Amortization	(1,805)	(1,647)
Net Intangible Assets	$ 4,881	$ 4,978