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Debt and Other Obligations - Revolving credit facility (Details)
$ in Thousands
3 Months Ended
Apr. 02, 2019
EUR (€)
Apr. 01, 2019
EUR (€)
May 05, 2017
EUR (€)
May 04, 2017
Jul. 25, 2014
EUR (€)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
May 05, 2017
USD ($)
Jul. 25, 2014
USD ($)
Debt Instrument [Line Items]                    
Amortization of debt issuance costs           $ 501 $ 535      
Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity | € € 250,000,000.0 € 75,000,000.0 € 175,000,000.0   € 115,000,000.0          
Transaction costs           3,200   $ 3,400 $ 2,300 $ 3,300
Commitment fee percentage     35.00% 40.00%            
Line of credit, maturity date 3 years                  
Leverage ratio   2.30                
Amortization of debt issuance costs           $ 200 $ 200      
Revolving Credit Facility | Eurodollar                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 0.019% 2.50%       2.15%        
Commitment fee percentage 35.00%                  
Revolving Credit Facility | Minimum                    
Debt Instrument [Line Items]                    
Leverage ratio 1.75         2.25        
Revolving Credit Facility | Minimum | EURIBOR and LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate         2.50%          
Revolving Credit Facility | Maximum                    
Debt Instrument [Line Items]                    
Leverage ratio 2.25         2.75        
Revolving Credit Facility | Maximum | EURIBOR and LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate         3.00%