XML 94 R73.htm IDEA: XBRL DOCUMENT v3.20.2
Business Segment Information - Summary of Net Sales of Company Recognized at a Point in Time Versus Over Time (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Jun. 27, 2020
Jun. 29, 2019
Disaggregation of Revenue [Line Items]        
Total net sales $ 519,984 $ 599,162 $ 984,923 $ 1,113,024
Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 95,105 100,292 192,350 199,545
Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 205,064 211,897 395,820 405,256
Net Sales Recognized at a Point in Time: [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 393,787 472,072 735,712 865,334
Net Sales Recognized at a Point in Time: [Member] | Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 219,815 286,973 396,753 508,223
Net Sales Recognized at a Point in Time: [Member] | Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 95,105 100,292 192,350 199,545
Net Sales Recognized at a Point in Time: [Member] | Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 78,867 84,807 146,609 157,566
Net Sales Recognized Over Time: [Member] | Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 126,197 $ 127,090 $ 249,211 $ 247,690