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Securities - Additional Information (Detail) $ in Thousands | Jun. 30, 2015 USD ($) Securities | Dec. 31, 2014 USD ($) Securities
--- | --- | ---
Investments, Debt and Equity Securities [Abstract] |  |
Number of securities holdings | 0 | 0
Shareholders' equity percentage | 10.00% | 10.00%
Securities | $ | $ 344,036 | $ 325,799

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- Definition Number of securities holdings. + References No definition available. + Details
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- Definition Shareholders equity percentage. + References No definition available. + Details
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- Definition The fair value of trading 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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