Quarterly report pursuant to Section 13 or 15(d)

Acquisition and Divestiture Activities - Narrative (Details)

v3.20.2
Acquisition and Divestiture Activities - Narrative (Details)
3 Months Ended 9 Months Ended
Oct. 04, 2019
USD ($)
Jul. 12, 2019
USD ($)
Jul. 01, 2019
USD ($)
Feb. 13, 2019
USD ($)
Sep. 28, 2019
USD ($)
Mar. 30, 2019
USD ($)
Sep. 26, 2020
USD ($)
element
Sep. 28, 2019
USD ($)
Dec. 31, 2019
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Acquisition of Business, Net of Cash Acquired             $ 0 $ 21,785,000  
Number of elements for contingent earnouts | element             2    
Proceeds on Sale of Assets             $ 1,600,000 $ 0  
Freedom Communication Technologies, Inc.                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Acquisition of Business, Net of Cash Acquired     $ 21,800,000            
Cash acquired     $ 600,000            
Diagnosys                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Cash paid to acquire stock $ 7,000,000.0                
Fair value of contingent purchase consideration 2,500,000                
Potential additional earn-out $ 13,000,000.0                
Achievement period 3 years                
Earn-out achievement benchmark $ 72,000,000.0                
Disposed by Sale | Airfield Lighting Product Line Assets                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Proceeds on Sale of Assets   $ 1,000,000.0              
Percentage of revenue (as a percentage)   1.00%              
Loss on sale         $ 1,300,000        
Held for Sale | First Earnout                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Maximum total earnout proceeds             35,000,000.0    
Held for Sale | Second Earnout                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Maximum total earnout proceeds             $ 0    
Held for Sale | Test Systems Segment                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Property, plant and equipment classified as held for sale                 $ 1,500,000
Divestiture by Sale | Test Systems Segment                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Total cash proceeds of divesture       $ 103,800,000          
Gain on sale, net of tax           $ 80,100,000      
Income taxes from divesture           $ 19,700,000