Receivables (Tables)
 9 Months Ended
Sep. 27, 2019
Receivables [Abstract]  
Schedule of Receivables
Receivables were comprised of the following:
 
 
September 27,
 
December 31,
(In thousands)
 
2019
 
2018
Billed receivables
 
$
48,297

 
$
44,868

Unbilled receivables (contract assets)
 
194,729

 
181,009

Other
 
11,770

 
6,242

Total receivables
 
$
254,796

 
$
232,119