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Revolving Credit Facility and Long-Term Debt - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Outstanding borrowings $ 351,625  
Credit Agreement    
Debt Instrument [Line Items]    
Outstanding borrowings 351,600  
Available borrowing capacity $ 389,000  
Fixed interest rate percent 2.37% 2.62%
Debt subject to fixed interest rate $ 175,000 $ 175,000
Variable interest rate percent 1.40% 3.30%
Debt subject to variable interest rate $ 176,600 $ 265,000
Term Loan    
Debt Instrument [Line Items]    
Outstanding borrowings 140,625 148,125
Term Loan | Credit Agreement    
Debt Instrument [Line Items]    
Debt instrument, face amount 150,000  
Revolving Credit Facility    
Debt Instrument [Line Items]    
Outstanding borrowings 211,000 $ 291,875
Revolving Credit Facility | Credit Agreement    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 600,000