Receivables (Tables)
 3 Months Ended
Mar. 30, 2018
Receivables [Abstract]  
Schedule of Receivables
Receivables were comprised of the following:
 
 
March 30,
 
December 31,
(In thousands)
 
2018
 
2017
Billed receivables
 
$
87,275

 
$
50,595

Unbilled receivables
 
156,048

 
121,601

Other
 
2,729

 
2,799

Total receivables
 
$
246,052

 
$
174,995