Receivables (Tables)
 6 Months Ended
Jul. 01, 2016
Receivables [Abstract]  
Schedule of Receivables
Receivables were comprised of the following:

 
July 1,
 
December 31,
(In thousands)
 
2016
 
2015
Billed receivables
 
$
45,946

 
$
53,070

Unbilled receivables
 
128,610

 
154,658

Other
 
3,127

 
2,833

Receivables
 
$
177,683

 
$
210,561