Quarterly report pursuant to Section 13 or 15(d)

Business Segments and Customer Information, Major Customers (Details)

v3.5.0.2
Business Segments and Customer Information, Major Customers (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Revenue, Major Customer [Line Items]        
Revenues $ 172,780 $ 137,396 $ 476,889 $ 389,313
Percentage of revenue by customer 100.00% 100.00% 100.00% 100.00%
U.S. Postal Service        
Revenue, Major Customer [Line Items]        
Revenues $ 44,433 $ 47,356 $ 135,025 $ 136,875
Percentage of revenue by customer 25.70% 34.50% 28.30% 35.10%
U.S. Navy        
Revenue, Major Customer [Line Items]        
Revenues $ 43,424 $ 24,036 $ 109,884 $ 68,040
Percentage of revenue by customer 25.10% 17.50% 23.00% 17.50%
U.S. Army        
Revenue, Major Customer [Line Items]        
Revenues $ 40,155 $ 20,476 $ 96,656 $ 58,204
Percentage of revenue by customer 23.30% 14.90% 20.30% 15.00%
U.S. Air Force        
Revenue, Major Customer [Line Items]        
Revenues $ 757 $ 869 $ 2,614 $ 2,583
Percentage of revenue by customer 0.40% 0.60% 0.50% 0.60%
Total Department of Defense        
Revenue, Major Customer [Line Items]        
Revenues $ 84,336 $ 45,381 $ 209,154 $ 128,827
Percentage of revenue by customer 48.80% 33.00% 43.80% 33.10%
Commercial Aviation        
Revenue, Major Customer [Line Items]        
Revenues $ 32,489 $ 32,976 $ 98,099 $ 87,644
Percentage of revenue by customer 18.80% 24.00% 20.60% 22.50%
Other Commercial        
Revenue, Major Customer [Line Items]        
Revenues $ 2,720 $ 1,587 $ 7,807 $ 4,554
Percentage of revenue by customer 1.60% 1.20% 1.60% 1.20%
Total - Commercial        
Revenue, Major Customer [Line Items]        
Revenues $ 35,209 $ 34,563 $ 105,906 $ 92,198
Percentage of revenue by customer 20.40% 25.20% 22.20% 23.70%
Department of Energy        
Revenue, Major Customer [Line Items]        
Revenues $ 2,981 $ 2,817 $ 8,890 $ 11,923
Percentage of revenue by customer 1.70% 2.00% 1.90% 3.10%
Social Security Administration        
Revenue, Major Customer [Line Items]        
Revenues $ 2,376 $ 2,431 $ 7,426 $ 7,152
Percentage of revenue by customer 1.40% 1.70% 1.60% 1.80%
Other Government        
Revenue, Major Customer [Line Items]        
Revenues $ 3,445 $ 4,848 $ 10,488 $ 12,338
Percentage of revenue by customer 2.00% 3.60% 2.20% 3.20%
Total - Other Civilian Agencies        
Revenue, Major Customer [Line Items]        
Revenues $ 8,802 $ 10,096 $ 26,804 $ 31,413
Percentage of revenue by customer 5.10% 7.30% 5.70% 8.10%