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Accounts Receivable, net
9 Months Ended
Sep. 27, 2020
Receivables [Abstract]  
Accounts Receivable, net Accounts Receivable, netThe components of Accounts receivable, net consisted of the following as of the dates presented (in thousands):
September 27,December 31,
20202019
Billed receivables$184,700 $148,747 
Unbilled receivables263,085 295,103 
Less allowance for credit losses(2,356)(1,670)
    Total accounts receivables, net$445,429 $442,180 

As of September 27, 2020 approximately 90.7% of the Company’s accounts receivable are with the U.S. government.