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Long-Term Debt - Additional Information (Details)
Oct. 24, 2019
USD ($)
covenant
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]    
2021   $ 15,100,000
2022   15,000,000.0
2023   15,000,000.0
2024   240,200,000
2025   20,000.00
Thereafter   0
the Credit Agreement | Bank revolving credit facility    
Debt Instrument [Line Items]    
Number of covenants | covenant 2  
the Credit Agreement | Line of Credit | Bank revolving credit facility    
Debt Instrument [Line Items]    
Aggregate commitments $ 650,000,000.0  
Maximum amount of aggregate commitments 200,000,000.0  
Fair value of amount outstanding   285,200,000
the Credit Agreement | Term Facility | Bank revolving credit facility    
Debt Instrument [Line Items]    
Aggregate commitments $ 300,000,000.0  
Interest rate during period 5.00%  
Expiration period 5 years  
Fair value of amount outstanding   $ 280,200,000
Interest rate at period end   1.90%
the Credit Agreement | Standby Letters of Credit | Bank revolving credit facility    
Debt Instrument [Line Items]    
Aggregate commitments $ 350,000,000.0  
Expiration period 5 years  
Fair value of amount outstanding   $ 5,000,000.0
Interest rate at period end   4.00%
Amount of capacity   $ 2,200,000
Available borrowings   $ 176,700,000