Revenues - Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 475,839	$ 533,098	$ 1,364,176	$ 1,581,590
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	229,097	247,236	644,684	699,644
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 246,742	$ 285,862	$ 719,492	$ 881,946

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details