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Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statement of Income Derivative in Cash Flow Hedging Relationship (Detail) (Cash Flow Hedging [Member], Interest Rate Contracts One [Member], USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Cash Flow Hedging [Member] | Interest Rate Contracts One [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Amount of Loss Recognized in Other Comprehensive Income on Derivative (Effective Portion) | $ 240 | $ 25 | $ (110) | $ 1,338

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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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