Goodwill and Other Intangible Assets - Amortization of Goodwill and Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 6,893	$ 6,893
Accumulated Amortization	6,180	5,990
Deposit Premium [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,907	3,907
Accumulated Amortization	3,907	3,907
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,470	2,470
Accumulated Amortization	1,757	1,567
Employment Related [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	516	516
Accumulated Amortization	$ 516	$ 516