Description of Business and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Cumulative Catch-Up Adjustments
Cumulative catch-up adjustments are presented in the following table:
 
 
Year Ended December 31,
(in thousands)
 
2014
 
2013
 
2012
Favorable adjustments
 
$
3,981

 
$
42,206

 
$
11,896

Unfavorable adjustments ¹
 
(6,629
)
 
(3,906
)
 
(1,065
)
Net (unfavorable) favorable adjustments
 
$
(2,648
)
 
$
38,300

 
$
10,831

¹ Of the $6.6 million unfavorable change in estimates in 2014, $2.5 million is due to the TARS program, which was retained by Exelis.