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Borrowings (Details)
€ in Millions
3 Months Ended 9 Months Ended
Dec. 21, 2020
EUR (€)
May 08, 2018
Dec. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Apr. 03, 2021
EUR (€)
Apr. 03, 2021
USD ($)
Nov. 07, 2016
EUR (€)
Nov. 07, 2016
USD ($)
Debt [Line Items]                
Additional sources of cash available           $ 16,000,000.0    
Debt instrument, unused borrowing capacity, amount           14,300,000    
Rofin-Sinar                
Debt [Line Items]                
Lines of credit, maximum borrowing capacity               $ 30,000,000.0
Swing line, maximum borrowing capacity               $ 10,000,000.0
Credit agreement november 7 2016                
Debt [Line Items]                
Senior secured net leverage ratio to maintain compliance on the loan each quarter end             3.50 3.50
Loan Agreement December 21 2020 | Commerzbank | Foreign Line of Credit                
Debt [Line Items]                
Lines of credit, maximum borrowing capacity | € € 24.0              
Debt Instrument, Interest Rate, Stated Percentage 1.55%              
Debt Instrument, Term 10 years              
Euro                
Debt [Line Items]                
Domestic line of credit drawn | €             € 10.0  
Line of Credit, Foreign | Europe, other                
Debt [Line Items]                
Amounts drawn upon line of credit           1,700,000    
Euro term loan                
Debt [Line Items]                
Debt Issuance costs for revolving credit facility     $ 28,500,000          
Amortization period of the debt issuance cost       7 years        
Short-term Debt [Line Items]                
Debt Issuance costs for revolving credit facility     28,500,000          
Debt Issuance Costs, Gross     $ 500,000          
Euro term loan | Minimum | Eurodollar                
Debt [Line Items]                
Debt instrument, interest rate, stepdown   1.25%            
Euro term loan | Euro                
Debt [Line Items]                
Borrowed under forward contract purchased for the term loan | €             € 670.0  
Forward contract purchased for the term loan | €         € 354.9      
Additional euro currency rate             0.010 0.010
Quarter principal payment requirement for euro term loan             0.0025 0.0025
Euro term loan | Euro | Minimum                
Debt [Line Items]                
Applicable margin for eurocurrency rate loan             0.0425 0.0425
Revolving line of credit                
Debt [Line Items]                
Revolving facility to finance acquisition of rofin               $ 100,000,000.0
Revolving facility to finance acquisition of Rofin, outstanding balance           $ 10,000,000.0    
Additional base rate             0.0050 0.0050
Debt Issuance costs for revolving credit facility       $ 2,300,000        
debt issuance cost amortization period       5 years        
Short-term Debt [Line Items]                
Debt Issuance costs for revolving credit facility       $ 2,300,000        
Revolving line of credit | Minimum                
Debt [Line Items]                
Base rate range after 1st year             0.0225 0.0225
Applicable margin for base rate revolving loan             0.0325 0.0325
Commitment fee accrues range on unused portion of revolving loan             0.00375 0.00375
Revolving line of credit | Maximum                
Debt [Line Items]                
Commitment fee accrues range on unused portion of revolving loan             0.005 0.005