Quarterly report pursuant to Section 13 or 15(d)

Business Segments and Customer Information, Major Customers (Details)

v3.2.0.727
Business Segments and Customer Information, Major Customers (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Revenue, Major Customer [Line Items]        
Revenue $ 131,126 $ 107,962 $ 251,917 $ 227,371
Revenue by customer (in hundredths) 100.00% 100.00% 100.00% 100.00%
U.S. Navy [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 22,607 $ 24,142 $ 44,004 $ 48,756
Revenue by customer (in hundredths) 17.20% 22.40% 17.40% 21.50%
U.S. Army/Army Reserve [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 18,557 $ 28,026 $ 37,728 $ 61,724
Revenue by customer (in hundredths) 14.20% 26.00% 15.00% 27.10%
U.S. Air Force [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 924 $ 809 $ 1,714 $ 1,605
Revenue by customer (in hundredths) 0.70% 0.70% 0.70% 0.70%
Total DoD [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 42,088 $ 52,977 $ 83,446 $ 112,085
Revenue by customer (in hundredths) 32.10% 49.10% 33.10% 49.30%
U.S. Postal Service [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 45,339 $ 41,263 $ 89,519 $ 80,592
Revenue by customer (in hundredths) 34.50% 38.20% 35.50% 35.40%
Department of Energy [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 4,662 $ 4,923 $ 9,106 $ 9,549
Revenue by customer (in hundredths) 3.60% 4.50% 3.60% 4.20%
Department of Treasury [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 572 $ 573 $ 987 $ 8,931
Revenue by customer (in hundredths) 0.40% 0.50% 0.40% 3.90%
Other Government [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 4,801 $ 7,288 $ 11,224 $ 14,467
Revenue by customer (in hundredths) 3.70% 6.80% 4.50% 6.40%
Total Federal Civilian Agencies [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 55,374 $ 54,047 $ 110,836 $ 113,539
Revenue by customer (in hundredths) 42.20% 50.00% 44.00% 49.90%
Commercial [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 33,664 $ 938 $ 57,635 $ 1,747
Revenue by customer (in hundredths) 25.70% 0.90% 22.90% 0.80%
Commercial Aviation [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 31,904 $ 0 $ 54,668 $ 0
Revenue by customer (in hundredths) 24.30% 0.00% 21.70% 0.00%
Other Commercial [Member]        
Revenue, Major Customer [Line Items]        
Revenue $ 1,760 $ 938 $ 2,967 $ 1,747
Revenue by customer (in hundredths) 1.40% 0.90% 1.20% 0.80%