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Commitments and Contingencies (Litigation) (Details)
$ in Millions
9 Months Ended 12 Months Ended 17 Months Ended 69 Months Ended
Apr. 16, 2015
claims
Dec. 31, 2015
USD ($)
claims
Mar. 31, 2015
USD ($)
Dec. 15, 2009
claims
plaintiffs
Dec. 31, 2015
claims
Sep. 24, 2014
claims
Sep. 07, 2010
claims
Jul. 02, 2010
claims
Former stockholder litigation                
Loss Contingencies [Line Items]                
Loss contingencies, number of plaintiffs | plaintiffs       6        
Loss contingencies, new claims filed, number       9        
Loss contingencies, claims amended, number           2 1 3
Loss contingencies, claims dismissed, number         3      
Loss contingencies, claims settled, number 1              
Loss contingencies, pending claims, number   4     4      
Former stockholder litigation | United States Court of Appeals for the Ninth Circuit                
Loss Contingencies [Line Items]                
Loss contingencies, pending claims, number   1     1      
Former stockholder litigation | United States District Court for the Southern District of New York                
Loss Contingencies [Line Items]                
Loss contingencies, pending claims, number   3     3      
Former stockholder litigation | RICO                
Loss Contingencies [Line Items]                
Loss contingencies, damages sought, value | $   $ 291.7 $ 291.7          
Government Contracts Concentration Risk [Member]                
Loss Contingencies [Line Items]                
Concentration Risk, Percentage   97.00%