Annual report pursuant to Section 13 and 15(d)

Business Segments and Customer Information, Major Customers (Details)

v3.3.1.900
Business Segments and Customer Information, Major Customers (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 533,982 $ 424,071 $ 471,638
Percentage of revenue by customer 100.00% 100.00% 100.00%
U.S. Postal Service [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 184,876 $ 167,268 $ 142,203
Percentage of revenue by customer 34.60% 39.40% 30.10%
U.S. Army [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 80,086 $ 101,714 $ 101,736
Percentage of revenue by customer 15.00% 24.00% 21.60%
U.S. Navy [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 98,887 $ 88,007 $ 123,307
Percentage of revenue by customer 18.50% 20.70% 26.10%
U.S. Air Force [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 3,558 $ 3,323 $ 3,625
Percentage of revenue by customer 0.70% 0.80% 0.80%
Total Department of Defense [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 182,531 $ 193,044 $ 228,668
Percentage of revenue by customer 34.20% 45.50% 48.50%
Commercial Aviation [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 119,729 $ 0 $ 0
Percentage of revenue by customer 22.40% 0.00% 0.00%
Other Commercial [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 4,653 $ 3,680 $ 2,250
Percentage of revenue by customer 0.90% 0.90% 0.50%
Total Commercial [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 124,382 $ 3,680 $ 2,250
Percentage of revenue by customer 23.30% 0.90% 0.50%
Department of Energy [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 16,020 $ 19,000 $ 20,124
Percentage of revenue by customer 3.00% 4.50% 4.30%
Social Security Administration [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 9,666 $ 10,153 $ 12,981
Percentage of revenue by customer 1.80% 2.40% 2.80%
Department of Treasury [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 1,405 $ 10,897 $ 35,929
Percentage of revenue by customer 0.30% 2.60% 7.60%
Other Government [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 15,102 $ 20,029 $ 29,483
Percentage of revenue by customer 2.80% 4.70% 6.20%
Total Other - Civilian Agencies [Member]      
Revenue, Major Customer [Line Items]      
Revenue, by customer $ 42,193 $ 60,079 $ 98,517
Percentage of revenue by customer 7.90% 14.20% 20.90%