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Effect of Derivative and Hedging Activity, on Consolidated Statements of Income (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Derivatives designated as hedges |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ 116 | $ 122 | $ 162
Interest Rate Swaps Agreement | Designated as Hedging Instrument | Interest And Fee |  |  |
Derivatives designated as hedges |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ 116 | $ 122 | $ 162

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- References No definition available. + Details
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