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Borrowings - Additional Information (Details)
€ in Millions, $ in Millions
3 Months Ended 12 Months Ended
Dec. 30, 2017
USD ($)
Oct. 03, 2020
EUR (€)
Oct. 03, 2020
USD ($)
Nov. 20, 2018
USD ($)
Nov. 07, 2016
EUR (€)
Nov. 07, 2016
USD ($)
Line of Credit Facility [Line Items]            
Revolving facility to finance acquisition of Rofin       $ 28.5    
Revolving facility to finance acquisition of Rofin, outstanding balance     $ 10.0      
Debt issuance cost related to repricing $ 0.5          
Additional sources of cash available     16.9      
Unused borrowing capacity     $ 16.1      
Rofin-Sinar            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity           $ 30.0
Swing line, maximum borrowing capacity           $ 10.0
Euro Term Loans            
Line of Credit Facility [Line Items]            
Debt Instrument, Term   7 years        
Base Rate Loans | Eurodollar            
Line of Credit Facility [Line Items]            
Debt instrument, basis spread on variable rate   4.25%        
Base Rate Loans | Base Rate            
Line of Credit Facility [Line Items]            
Debt instrument, basis spread on variable rate   3.25%        
Credit Agreement November 7 2016            
Line of Credit Facility [Line Items]            
Senior secured net leverage ratio to maintain compliance on the loan each quarter end         3.50 3.50
Euro term loan            
Line of Credit Facility [Line Items]            
Debt issuance costs 28.5          
Euro term loan | Eurodollar | Minimum            
Line of Credit Facility [Line Items]            
Debt Instrument, Interest Rate, Stepdown   1.25%        
Revolving line of credit            
Line of Credit Facility [Line Items]            
Revolving facility to finance acquisition of Rofin           $ 100.0
Additional base rate         0.0050 0.0050
Debt issuance costs $ 2.3          
Debt issuance cost amortization period 5 years          
Revolving line of credit | Minimum            
Line of Credit Facility [Line Items]            
Commitment fee accrues range on unused portion of revolving loan         0.00375 0.00375
Base rate range after 1st year   0.0225 0.0225      
Revolving line of credit | Maximum            
Line of Credit Facility [Line Items]            
Commitment fee accrues range on unused portion of revolving loan         0.005 0.005
Line of Credit, Foreign            
Line of Credit Facility [Line Items]            
International credit facilities as guarantees     $ 0.8      
Euro            
Line of Credit Facility [Line Items]            
Letters of Credit Outstanding, Amount | €   € 10.0        
Euro | Euro term loan            
Line of Credit Facility [Line Items]            
Forward contract purchased for the term loan | €   € 358.2     € 670.0  
Additional Euro currency rate         0.010 0.010
Quarter principal payment requirement for Euro term loan         0.0025 0.0025