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DEBT - Narrative (Details)
6 Months Ended
Dec. 23, 2021
USD ($)
bank
Jun. 30, 2022
USD ($)
Jun. 30, 2022
EUR (€)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
EUR (€)
Debt Instrument [Line Items]          
Outstanding borrowings   $ 142,500,000   $ 150,000,000  
Syndicated Credit Facility | Term Loan          
Debt Instrument [Line Items]          
Outstanding borrowings   142,500,000   150,000,000  
Syndicated Credit Facility | Revolving Credit Facility          
Debt Instrument [Line Items]          
Outstanding borrowings   0   0  
Commerzbank Line of Credit          
Debt Instrument [Line Items]          
Outstanding borrowings   $ 0   $ 0  
Credit Facility | Syndicated Credit Facility          
Debt Instrument [Line Items]          
Credit facility, term 5 years        
Maximum borrowing capacity $ 200,000,000        
Amortization of principal, percent 10.00%        
Accordion feature $ 100,000,000        
Credit agreement, number of banks | bank 4        
Debt instrument, covenant, debt service coverage ratio   1.35      
Credit Facility | Syndicated Credit Facility | Quarter Ended June 30, 2022 Through Quarter March 31, 2023          
Debt Instrument [Line Items]          
Line of credit facility, maximum leverage ratio   3.25      
Credit Facility | Syndicated Credit Facility | Quarter Ended June 30, 2023 And Thereafter          
Debt Instrument [Line Items]          
Line of credit facility, maximum leverage ratio   3.0      
Credit Facility | Syndicated Credit Facility | Term Loan          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 150,000,000        
Credit Facility | Syndicated Credit Facility | Revolving Credit Facility          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 50,000,000        
Credit Facility | Alternate Currencies Revolving Loan | Minimum | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread on variable interest rate   1.50%      
Credit Facility | Alternate Currencies Revolving Loan | Minimum | Base Rate          
Debt Instrument [Line Items]          
Basis spread on variable interest rate   0.50%      
Credit Facility | Alternate Currencies Revolving Loan | Maximum | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread on variable interest rate   3.00%      
Credit Facility | Alternate Currencies Revolving Loan | Maximum | Base Rate          
Debt Instrument [Line Items]          
Basis spread on variable interest rate   2.00%      
Credit Facility | German Bank Line of Credit          
Debt Instrument [Line Items]          
Maximum borrowing capacity | €     € 7,000,000    
Credit Facility | Commerzbank Line of Credit          
Debt Instrument [Line Items]          
Outstanding borrowings | €     0   € 0
Amount of bank guarantees secured by line of credit | €     € 2,694,000   € 2,997,000