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Revenues - Major Products and Services in Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,458,525	$ 1,215,742
Process and analytical instrumentation
Disaggregation of Revenue [Line Items]
Net sales	692,692	576,559
Aerospace and power
Disaggregation of Revenue [Line Items]
Net sales	421,809	336,538
Automation and engineered solutions
Disaggregation of Revenue [Line Items]
Net sales	344,024	302,645
Electronic Instruments Group
Disaggregation of Revenue [Line Items]
Net sales	987,759	790,924
Electronic Instruments Group | Process and analytical instrumentation
Disaggregation of Revenue [Line Items]
Net sales	692,692	576,559
Electronic Instruments Group | Aerospace and power
Disaggregation of Revenue [Line Items]
Net sales	295,067	214,365
Electronic Instruments Group | Automation and engineered solutions
Disaggregation of Revenue [Line Items]
Net sales	0	0
Electromechanical Group
Disaggregation of Revenue [Line Items]
Net sales	470,766	424,818
Electromechanical Group | Process and analytical instrumentation
Disaggregation of Revenue [Line Items]
Net sales	0	0
Electromechanical Group | Aerospace and power
Disaggregation of Revenue [Line Items]
Net sales	126,742	122,173
Electromechanical Group | Automation and engineered solutions
Disaggregation of Revenue [Line Items]
Net sales	$ 344,024	$ 302,645

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