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Earnings Per Share - Narrative (Details)
6 Months Ended
Dec. 24, 2020
payment
shares
Apr. 04, 2018
USD ($)
Mar. 27, 2018
USD ($)
Jun. 30, 2021
USD ($)
shares
Debt Instrument [Line Items]        
Aggregate number of shares (shares)       1,858,500
Sale of stock (shares) 4,166,663      
Number of equal tranches | payment 3      
Unsecured obligations        
Debt Instrument [Line Items]        
Aggregate principal amount | $       $ 5,300,000
Unsecured obligations | 2.50% Convertible notes due 2023        
Debt Instrument [Line Items]        
Aggregate principal amount | $   $ 171,500,000 $ 150,000,000.0  
Conversion ratio   0.0323428 0.0323428  
Shares issued (shares)       0
Issuable upon conversion of the Notes (shares)       5,500,000