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Revenues - Timing of Revenue Recognition (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Line Items]      
Net sales $ 4,540,029 $ 5,158,557 $ 4,845,872
Products transferred at a point in time      
Disaggregation of Revenue [Line Items]      
Net sales 3,817,828 4,350,744 4,223,842
Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Net sales 722,201 807,813 622,030
EIG      
Disaggregation of Revenue [Line Items]      
Net sales 2,989,928 3,322,881 3,028,959
EIG | Products transferred at a point in time      
Disaggregation of Revenue [Line Items]      
Net sales 2,427,254 2,680,296 2,533,718
EIG | Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Net sales 562,674 642,585 495,241
EMG      
Disaggregation of Revenue [Line Items]      
Net sales 1,550,101 1,835,676 1,816,913
EMG | Products transferred at a point in time      
Disaggregation of Revenue [Line Items]      
Net sales 1,390,574 1,670,448 1,690,124
EMG | Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Net sales $ 159,527 $ 165,228 $ 126,789