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Revenues - Major Products and Services in Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,202,218	$ 1,287,691
Process And Analytical Instrumentation [Member]
Disaggregation of Revenue [Line Items]
Net sales	548,440	577,340
Aerospace and Power [Member]
Disaggregation of Revenue [Line Items]
Net sales	353,036	348,449
Automation and engineered solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	300,742	361,902
Electronic Instruments Group [Member]
Disaggregation of Revenue [Line Items]
Net sales	774,225	806,911
Electronic Instruments Group [Member] | Process And Analytical Instrumentation [Member]
Disaggregation of Revenue [Line Items]
Net sales	548,440	577,340
Electronic Instruments Group [Member] | Aerospace and Power [Member]
Disaggregation of Revenue [Line Items]
Net sales	225,785	229,571
Electromechanical Group [Member]
Disaggregation of Revenue [Line Items]
Net sales	427,993	480,780
Electromechanical Group [Member] | Aerospace and Power [Member]
Disaggregation of Revenue [Line Items]
Net sales	127,251	118,878
Electromechanical Group [Member] | Automation and engineered solutions [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 300,742	$ 361,902

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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