Reportable Segments - Schedule of Revenue by Reportable Segment (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]                      
Total net revenues $ 73,202 $ 118,338 $ 80,885 $ 74,184 $ 92,465 $ 120,226 $ 68,590 $ 36,940 $ 346,609 $ 318,221 $ 180,824
Government gross profit                      
Segment Reporting Information [Line Items]                      
Total net revenues                 247,981 221,581 105,858
Commercial gross profit                      
Segment Reporting Information [Line Items]                      
Total net revenues                 $ 98,628 $ 96,640 $ 74,966