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Borrowings - Additional Information (Details)
€ in Millions, $ in Millions
3 Months Ended 12 Months Ended
Dec. 21, 2020
EUR (€)
Dec. 29, 2018
USD ($)
Oct. 02, 2021
EUR (€)
Oct. 02, 2021
USD ($)
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       15.0      
Unused borrowing capacity       $ 13.1      
Loan Agreement December 21 2020 | Foreign Line of Credit | Commerzbank              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity | € € 24.0            
Debt Instrument, Term 10 years            
Debt Instrument, Interest Rate, Stated Percentage 1.55%            
International credit facilities as guarantees | € € 24.0            
Rofin-Sinar              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity             $ 30.0
Swing line, maximum borrowing capacity             $ 10.0
Base Rate Loans | Eurodollar              
Line of Credit Facility [Line Items]              
Debt instrument, basis spread on variable rate     4.00%        
Base Rate Loans | Base Rate              
Line of Credit Facility [Line Items]              
Debt instrument, basis spread on variable rate     3.00%        
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 Loans              
Line of Credit Facility [Line Items]              
Debt Instrument, Term     7 years        
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]              
Base rate range after 1st year     0.0225 0.0225      
Commitment fee accrues range on unused portion of revolving loan           0.00375 0.00375
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       $ 1.9      
Euro              
Line of Credit Facility [Line Items]              
Letters of Credit Outstanding, Amount | €     € 10.0        
Restricted Cash     10.5 $ 12.2      
Euro | Euro term loan              
Line of Credit Facility [Line Items]              
Forward contract purchased for the term loan | €     € 351.5     € 670.0  
Additional Euro currency rate           0.010 0.010
Quarter principal payment requirement for Euro term loan           0.0025 0.0025