Receivables (Tables)
 12 Months Ended
Dec. 31, 2016
Receivables [Abstract]  
Schedule of Receivables
Receivables were comprised of the following:
 
 
December 31,
(In thousands)
 
2016
 
2015
Billed receivables
 
$
41,992

 
$
53,070

Unbilled contract receivables
 
127,150

 
154,658

Other
 
2,930

 
2,833

Receivables
 
$
172,072

 
$
210,561