Receivables (Tables)
 12 Months Ended
Dec. 31, 2014
Receivables [Abstract]  
Schedule of Receivables
Receivables were comprised of the following:
 
 
December 31,
(In thousands)
 
2014
 
2013
Billed receivables
 
$
41,997

 
$
68,508

Unbilled contract receivables
 
160,735

 
159,026

Receivables
 
$
202,732

 
$
227,534