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Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($) | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract] |  |
Expense related to pension liability reclassified from accumulated other comprehensive earnings | $ 2,900,000 | $ 3,100,000
Loss related to fair value of derivative investments reclassified from accumulated other comprehensive earnings | 3,700,000 | 2,500,000
Foreign currency translation reclassified from accumulated other comprehensive earnings | $ 0 | $ 0

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- Definition Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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