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Receivables
3 Months Ended
Mar. 31, 2023
Receivables [Abstract]  
Receivables
RECEIVABLES
Receivables were comprised of the following:
(In thousands)March 31, 2023December 31, 2022
Billed receivables$189,247 $227,718 
Unbilled receivables (contract assets)559,341 487,758 
Other 11,225 13,106 
Total receivables$759,813 $728,582 
As of March 31, 2023 and December 31, 2022, substantially all billed receivables are due from the U.S. government, either directly as prime contractor to the U.S. government or as subcontractor to another prime contractor to the U.S. government. Because the Company's billed receivables are with the U.S. government, the Company does not believe it has a material credit risk exposure.
Unbilled receivables are contract assets that represent revenue recognized on long-term contracts in excess of amounts billed as of the balance sheet date. We expect to bill customers for the majority of the March 31, 2023 contract assets during 2023. Changes in the balance of receivables are primarily due to the timing differences between our performance and customers' payments.