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Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]    
Expense related to pension liability reclassified from accumulated other comprehensive earnings $ 4,600,000 $ 5,400,000
Loss related to fair value of derivative investments reclassified from accumulated other comprehensive earnings 3,900,000 3,000,000.0
Foreign currency translation reclassified from accumulated other comprehensive earnings $ 0 $ 0