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Revenues - Timing of Revenue Recognition (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
Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,012,599	1,113,438
Products and Services Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	189,619	174,253
Electronic Instruments Group [Member]
Disaggregation of Revenue [Line Items]
Net sales	774,225	806,911
Electronic Instruments Group [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	633,540	677,833
Electronic Instruments Group [Member] | Products and Services Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	140,685	129,078
Electromechanical Group [Member]
Disaggregation of Revenue [Line Items]
Net sales	427,993	480,780
Electromechanical Group [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	379,059	435,605
Electromechanical Group [Member] | Products and Services Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 48,934	$ 45,175

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+ 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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