Quarterly report pursuant to Section 13 or 15(d)

Debt - Narrative (Details)

v3.21.1
Debt - Narrative (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2020
USD ($)
Mar. 31, 2021
EUR (€)
Sep. 30, 2020
EUR (€)
Line of Credit Facility [Line Items]                
Foreign currency translation adjustment, net of tax $ 8,897,000 $ (17,052,000) $ 30,647,000 $ (11,106,000)        
Designated as Hedging Instrument                
Line of Credit Facility [Line Items]                
Unrealized loss expected to be recognized over the next 12 months (1,772,000)       $ (1,772,000)      
Foreign currency translation adjustment, net of tax         4,852,000 $ 4,377,000    
Foreign currency translation adjustment, tax         1,575,000 1,420,000    
Designated as Hedging Instrument | Interest rate swap contracts | Cash Flow Hedging                
Line of Credit Facility [Line Items]                
Unrealized loss on fair value of interest rate swaps, before tax         (2,905,000) (7,792,000)    
Unrealized loss on fair value of interest rate swaps, after tax         (2,194,000) (5,884,000)    
2025 Senior Notes                
Line of Credit Facility [Line Items]                
Unamortized debt costs 2,474,000       2,474,000 2,744,000    
Senior Notes 2025 | 2025 Senior Notes                
Line of Credit Facility [Line Items]                
Debt issued amount $ 300,000,000       $ 300,000,000      
Fixed interest rate (as a percent) 5.25%       5.25%   5.25%  
Securitization Facility                
Line of Credit Facility [Line Items]                
Maximum amount of borrowings available $ 115,000,000       $ 115,000,000      
Outstanding borrowings $ 97,590,000       $ 97,590,000 67,700,000    
Interest rate on facility (as a percent) 0.86%   1.74%   0.86%   0.86%  
Securitization Facility | Minimum                
Line of Credit Facility [Line Items]                
Commitment fee (as a percent)         0.25%      
Securitization Facility | Maximum                
Line of Credit Facility [Line Items]                
Commitment fee (as a percent)         0.35%      
Securitization Facility | LIBOR                
Line of Credit Facility [Line Items]                
Interest rate on borrowings (as a percent)         0.75%      
Revolving Credit Facility | March 2020 Debt Amendment                
Line of Credit Facility [Line Items]                
Maximum amount of borrowings available $ 750,000,000       $ 750,000,000      
Maximum borrowing amount drawn In foreign currency 350,000,000       350,000,000      
Unamortized debt costs 2,481,000       $ 2,481,000 2,734,000    
Revolving Credit Facility | March 2020 Debt Amendment | Minimum                
Line of Credit Facility [Line Items]                
Annual commitment fee range on unused portion (as a percent)         0.15%      
Revolving Credit Facility | March 2020 Debt Amendment | Maximum                
Line of Credit Facility [Line Items]                
Annual commitment fee range on unused portion (as a percent)         0.30%      
Term Loan | March 2020 Debt Amendment                
Line of Credit Facility [Line Items]                
Maximum amount of borrowings available 35,000,000       $ 35,000,000      
Outstanding borrowings 0       $ 0 22,359,000    
Term Loan | March 2020 Debt Amendment | LIBOR                
Line of Credit Facility [Line Items]                
Interest rate during period (as a percent)         1.25%      
Term Loan | March 2020 Debt Amendment | LIBOR | Minimum                
Line of Credit Facility [Line Items]                
Interest rate on borrowings (as a percent)         0.75%      
Term Loan | March 2020 Debt Amendment | LIBOR | Maximum                
Line of Credit Facility [Line Items]                
Interest rate on borrowings (as a percent)         2.00%      
Domestic Revolving Credit Facility | March 2020 Debt Amendment                
Line of Credit Facility [Line Items]                
Maximum available for issuance of trade and standby letters of credit $ 35,000,000       $ 35,000,000      
Weighted-average interest rate on outstanding borrowings (as a percent) 2.17%   2.40%   2.17%   2.17%  
Foreign Line of Credit | Credit Facility With European Bank                
Line of Credit Facility [Line Items]                
Maximum amount of borrowings available $ 29,321,000       $ 29,321,000   € 25,000,000.0  
Outstanding borrowings $ 3,587,000       $ 3,587,000 22,166,000 € 3,100,000 € 18,900,000
Weighted-average interest rate on outstanding borrowings (as a percent) 2.25%   1.25%   2.25%   2.25%  
Foreign Line of Credit | Credit Facility With European Bank | Bank Guarantees                
Line of Credit Facility [Line Items]                
Maximum amount of borrowings available $ 9,383,000       $ 9,383,000   € 8,000,000.0  
United States of America, Dollars | Domestic Revolving Credit Facility | March 2020 Debt Amendment                
Line of Credit Facility [Line Items]                
Outstanding borrowings 250,000,000       250,000,000 257,439,000    
Euro Member Countries, Euro | Domestic Revolving Credit Facility | March 2020 Debt Amendment                
Line of Credit Facility [Line Items]                
Outstanding borrowings $ 113,764,000       $ 113,764,000 $ 137,188,000 € 97,000,000.0 € 117,000,000.0