Quarterly report pursuant to Section 13 or 15(d)

Business Segments - Financial information by segment (Details)

v3.22.1
Business Segments - Financial information by segment (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
segment
Mar. 31, 2021
USD ($)
Financial information for each of the Company's business segments        
Number of operating segments | segment     3  
Revenue:        
Revenue $ 1,177,326 $ 959,280 $ 2,328,202 $ 1,904,834
Gross profit:        
Gross profit $ 228,451 $ 230,658 $ 456,606 $ 436,713
Gross profit (as a percent) 19.40% 24.00% 19.60% 22.90%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 130,307 $ 112,402 $ 254,528 $ 224,369
Selling, general, and administrative expense (as a percent) 11.10% 11.70% 10.90% 11.80%
Operating income/(loss):        
Operating income $ 75,288 $ 113,186 $ 156,817 $ 200,758
Operating income (as a percent) 6.40% 11.80% 6.70% 10.50%
Amortization of intangible assets $ (22,856) $ (5,070) $ (45,261) $ (11,586)
Segment Reconciling Items        
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses (926) 2,818 1,928 5,045
Operating income/(loss):        
Amortization of intangible assets (22,856) (5,070) (45,261) (11,586)
Other 926 (2,818) (1,928) (5,045)
U.S. Services | Operating Segments        
Revenue:        
Revenue 398,077 448,215 784,494 833,149
Gross profit:        
Gross profit $ 84,971 $ 119,440 $ 174,670 $ 218,442
Gross profit (as a percent) 21.30% 26.60% 22.30% 26.20%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 38,273 $ 36,593 $ 73,375 $ 74,049
Selling, general, and administrative expense (as a percent) 9.60% 8.20% 9.40% 8.90%
Operating income/(loss):        
Operating income $ 46,698 $ 82,847 $ 101,295 $ 144,393
Operating income (as a percent) 11.70% 18.50% 12.90% 17.30%
U.S. Federal Services | Operating Segments        
Revenue:        
Revenue $ 573,288 $ 330,136 $ 1,155,159 $ 735,381
Gross profit:        
Gross profit $ 115,153 $ 74,133 $ 241,729 $ 156,629
Gross profit (as a percent) 20.10% 22.50% 20.90% 21.30%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 68,949 $ 50,978 $ 133,874 $ 103,230
Selling, general, and administrative expense (as a percent) 12.00% 15.40% 11.60% 14.00%
Operating income/(loss):        
Operating income $ 46,204 $ 23,155 $ 107,855 $ 53,399
Operating income (as a percent) 8.10% 7.00% 9.30% 7.30%
Outside the U.S. | Operating Segments        
Revenue:        
Revenue $ 205,961 $ 180,929 $ 388,549 $ 336,304
Gross profit:        
Gross profit $ 28,327 $ 37,085 $ 40,207 $ 61,642
Gross profit (as a percent) 13.80% 20.50% 10.30% 18.30%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 24,011 $ 22,013 $ 45,351 $ 42,045
Selling, general, and administrative expense (as a percent) 11.70% 12.20% 11.70% 12.50%
Operating income/(loss):        
Operating income $ 4,316 $ 15,072 $ (5,144) $ 19,597
Operating income (as a percent) 2.10% 8.30% (1.30%) 5.80%