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Other Assets And liabilities - Additional Information (Details) - USD ($)
$ in Thousands
Jun. 28, 2020
Dec. 31, 2019
Other Assets And Liabilities [Line Items]    
Interest receivable current $ 163  
Restricted investments current 11,411,600 $ 0
Debt issuance costs payable current 22,700  
Acrrued interest payable current $ 5,100