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Revolving Credit Facility and Long-Term Debt - Narrative (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Outstanding borrowings $ 279,000  
Credit Agreement    
Debt Instrument [Line Items]    
Outstanding borrowings 279,000  
Available borrowing capacity $ 456,000  
Fixed interest rate percent 2.71% 2.37%
Debt subject to fixed interest rate $ 75,000 $ 175,000
Variable interest rate percent 1.08% 1.40%
Debt subject to variable interest rate $ 204,000 $ 176,600
Term Loan    
Debt Instrument [Line Items]    
Outstanding borrowings 135,000 140,625
Term Loan | Credit Agreement    
Debt Instrument [Line Items]    
Debt instrument, face amount 150,000  
Revolving Credit Facility    
Debt Instrument [Line Items]    
Outstanding borrowings 144,000 $ 211,000
Revolving Credit Facility | Credit Agreement    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 600,000