Quarterly report pursuant to Section 13 or 15(d)

Business Segments and Customer Information, Major Customers (Details)

v3.7.0.1
Business Segments and Customer Information, Major Customers (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Revenue, Major Customer [Line Items]    
Revenues $ 197,294 $ 143,636
Percentage of revenue by customer 100.00% 100.00%
U.S. Postal Service    
Revenue, Major Customer [Line Items]    
Revenues $ 46,469 $ 46,297
Percentage of revenue by customer 23.60% 32.20%
U.S. Navy    
Revenue, Major Customer [Line Items]    
Revenues $ 52,496 $ 29,891
Percentage of revenue by customer 26.60% 20.80%
U.S. Army    
Revenue, Major Customer [Line Items]    
Revenues $ 54,101 $ 22,210
Percentage of revenue by customer 27.40% 15.50%
U.S. Air Force    
Revenue, Major Customer [Line Items]    
Revenues $ 1,018 $ 981
Percentage of revenue by customer 0.50% 0.70%
Total - DoD    
Revenue, Major Customer [Line Items]    
Revenues $ 107,615 $ 53,082
Percentage of revenue by customer 54.50% 37.00%
Commercial aviation    
Revenue, Major Customer [Line Items]    
Revenues $ 31,804 $ 33,546
Percentage of revenue by customer 16.10% 23.30%
Other commercial    
Revenue, Major Customer [Line Items]    
Revenues $ 3,129 $ 2,283
Percentage of revenue by customer 1.60% 1.60%
Total - Commercial    
Revenue, Major Customer [Line Items]    
Revenues $ 34,933 $ 35,829
Percentage of revenue by customer 17.70% 24.90%
Department of Energy    
Revenue, Major Customer [Line Items]    
Revenues $ 2,903 $ 2,903
Percentage of revenue by customer 1.50% 2.00%
Social Security Administration    
Revenue, Major Customer [Line Items]    
Revenues $ 2,181 $ 2,587
Percentage of revenue by customer 1.10% 1.80%
Other government    
Revenue, Major Customer [Line Items]    
Revenues $ 3,193 $ 2,938
Percentage of revenue by customer 1.60% 2.10%
Total – Other Civilian Agencies    
Revenue, Major Customer [Line Items]    
Revenues $ 8,277 $ 8,428
Percentage of revenue by customer 4.20% 5.90%