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Loans and Allowance for Loan Losses - Allowance for Loan Losses Outstanding by Impairment Methodology (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | $ 5,469 | $ 7,005
Collectively evaluated for impairment | 33,565 | 31,720
Non-residential real estate owner occupied [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | 231 | 238
Collectively evaluated for impairment | 4,596 | 4,866
Non-residential real estate other [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | 2,449 | 2,521
Collectively evaluated for impairment | 8,577 | 7,344
Residential real estate primary mortgage [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | 243 | 278
Collectively evaluated for impairment | 2,582 | 2,503
Residential real estate all other [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | 994 | 2,025
Collectively evaluated for impairment | 5,714 | 5,009
Non-consumer non-real estate [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | 966 | 1,403
Collectively evaluated for impairment | 8,011 | 7,982
Consumer non-real estate [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | 334 | 287
Collectively evaluated for impairment | 2,222 | 2,164
Other loans [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment | 252 | 253
Collectively evaluated for impairment | 1,739 | 1,632
Acquired loans [Member] |  |
Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment [Line Items] |  |
Individually evaluated for impairment |  |
Collectively evaluated for impairment | $ 124 | $ 220

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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