Receivables (Tables)
 9 Months Ended
Sep. 30, 2016
Receivables [Abstract]  
Schedule of Receivables
Receivables were comprised of the following:

 
September 30,
 
December 31,
(In thousands)
 
2016
 
2015
Billed receivables
 
$
24,648

 
$
53,070

Unbilled contract receivables
 
136,358

 
154,658

Other
 
3,029

 
2,833

Receivables
 
$
164,035

 
$
210,561