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Long-Term Debt (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Jan. 01, 2021
Dec. 31, 2019
Mar. 31, 2019
Long-Term Debt          
Interest rate (as a percent) 3.75%   3.75%    
Percent of securities in foreign subsidiaries guaranteed to secure debt 65.00%        
Principal payments of long term debt          
December 31, 2021 $ 127,317        
December 31, 2022 93,321        
December 31, 2023 62,920        
December 31, 2024 33,692        
Secured term loan facility | Loan and security agreement          
Long-Term Debt          
Borrowing   $ 100,000      
Interest rate (as a percent)   9.50%   12.00%  
Term Loan facility          
Long-Term Debt          
Incremental term loan $ 151,500        
Generate Lending, LLC | Secured term loan facility | Loan and security agreement          
Long-Term Debt          
Loan Amount         $ 100,000