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Fair Value Measurements - Derivatives' Cash Flow Hedging Relationships (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2016 | Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount recognized in Other Comprehensive Income (effective portion) | $ 600 | $ 1,400 | $ (3,015)
Pre-tax amount of gain/(loss) reclassified from AOCI into Net Income (effective portion) |  | 1,393 |
Interest Expense [Member] | Forward Starting Interest Rate Swap Contract [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount recognized in Other Comprehensive Income (effective portion) |  |  | $ (3,015)
Pre-tax amount of gain/(loss) reclassified from AOCI into Net Income (effective portion) |  | $ 1,393 |

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + 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 (c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624177-113959 + Details
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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=64837297&loc=SL5624171-113959 + Details
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