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Securities - Additional Information (Detail) $ in Thousands | Sep. 30, 2015 USD ($) Security | Dec. 31, 2014 USD ($)
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Amortized Cost and Fair Value Debt Securities [Abstract] |  |
Carrying value of pledged securities | $ 148,557 | $ 137,898
Number of securities in portfolio with unrealized losses | Security | 30 |

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- Definition Amortized Cost and Fair Value Debt Securities [Abstract] + References No definition available. + Details
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- Definition Total number of securities in the portfolio with unrealized losses. + References No definition available. + Details
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- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5086-111524 + Details
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