Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v3.10.0.1
Segment Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
segment
Dec. 31, 2017
USD ($)
Sep. 30, 2018
USD ($)
Financial information for each of the Company's business segments      
Number of operating segments | segment 3    
Revenue:      
Revenue $ 664,619 $ 623,148  
Gross profit:      
Gross profit $ 159,265 $ 151,960  
Gross profit (as a percent) 24.00% 24.40%  
Selling, general and administrative expense:      
Selling, general and administrative expenses $ 79,671 $ 69,559  
Selling, general, and administrative expense (as a percent) 12.00% 11.20%  
Operating income:      
Operating income $ 74,136 $ 79,683  
Operating income (as a percent) 11.20% 12.80%  
Amortization of intangible assets $ (5,458) $ (2,718)  
General Dynamics Information Technology's Citizen Engagement Centers      
Operating income:      
Business combination, acquisition related costs 2,700   $ 500
Segment Reconciling Items      
Operating income:      
Amortization of intangible assets (5,458) (2,718)  
Other      
Selling, general and administrative expense:      
Selling, general and administrative expenses 2,092 0  
Operating income:      
Operating income (2,092) 0  
U.S. Health & Human Services | Operating Segments      
Revenue:      
Revenue 294,213 304,241  
Gross profit:      
Gross profit $ 88,031 $ 84,231  
Gross profit (as a percent) 29.90% 27.70%  
Selling, general and administrative expense:      
Selling, general and administrative expenses $ 32,139 $ 34,805  
Selling, general, and administrative expense (as a percent) 10.90% 11.40%  
Operating income:      
Operating income $ 55,892 $ 49,426  
Operating income (as a percent) 19.00% 16.20%  
U.S. Federal Services | Operating Segments      
Revenue:      
Revenue $ 216,987 $ 132,983  
Gross profit:      
Gross profit $ 47,985 $ 33,358  
Gross profit (as a percent) 22.10% 25.10%  
Selling, general and administrative expense:      
Selling, general and administrative expenses $ 26,632 $ 16,648  
Selling, general, and administrative expense (as a percent) 12.30% 12.50%  
Operating income:      
Operating income $ 21,353 $ 16,710  
Operating income (as a percent) 9.80% 12.60%  
Outside the U.S. | Operating Segments      
Revenue:      
Revenue $ 153,419 $ 185,924  
Gross profit:      
Gross profit $ 23,249 $ 34,371  
Gross profit (as a percent) 15.20% 18.50%  
Selling, general and administrative expense:      
Selling, general and administrative expenses $ 18,808 $ 18,106  
Selling, general, and administrative expense (as a percent) 12.30% 9.70%  
Operating income:      
Operating income $ 4,441 $ 16,265  
Operating income (as a percent) 2.90% 8.70%