Loans and Allowance for Loan Losses - Concentrations within Loan Portfolio (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Concentrations Within Loan Portfolio [Abstract]
Loans	$ 1,053,243,000	$ 1,041,189,000	$ 1,072,422,000
Percentage of Loan Portfolio	100.00%	100.00%
Commercial Real Estate Loans to Lessors of Non-residential Buildings [Member]
Concentrations Within Loan Portfolio [Abstract]
Loans	$ 299,446,000	$ 302,723,000
Percentage of Loan Portfolio	28.40%	29.10%

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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