Quarterly report pursuant to Section 13 or 15(d)

Business Segments - Financial information by segment (Details)

v3.23.1
Business Segments - Financial information by segment (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Mar. 31, 2023
USD ($)
segment
Mar. 31, 2022
USD ($)
Financial information for each of the Company's business segments        
Number of operating segments | segment     3  
Revenue:        
Revenue $ 1,206,852 $ 1,177,326 $ 2,456,098 $ 2,328,202
Gross profit:        
Gross profit $ 228,603 $ 228,451 $ 473,350 $ 456,606
Gross profit (as a percent) 18.90% 19.40% 19.30% 19.60%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 142,448 $ 130,307 $ 288,900 $ 254,528
Selling, general, and administrative expenses (as a percent) 11.80% 11.10% 11.80% 10.90%
Loss on sale of businesses     $ 883 $ 0
Operating income/(loss):        
Operating income $ 62,505 $ 75,288 $ 137,282 $ 156,817
Operating income (as a percent) 5.20% 6.40% 5.60% 6.70%
Amortization of intangible assets $ (23,650) $ (22,856) $ (47,168) $ (45,261)
Loss on sale of businesses     (883) 0
Segment Reconciling Items        
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses (325) (926) 247 1,928
Loss on sale of businesses 883 0 883 0
Operating income/(loss):        
Amortization of intangible assets (23,650) (22,856) (47,168) (45,261)
Loss on sale of businesses (883) 0 (883) 0
U.S. Federal Services | Operating Segments        
Revenue:        
Revenue 584,075 573,288 1,202,242 1,155,159
Gross profit:        
Gross profit $ 122,874 $ 115,153 $ 245,568 $ 241,729
Gross profit (as a percent) 21.00% 20.10% 20.40% 20.90%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 75,050 $ 68,949 $ 146,699 $ 133,874
Selling, general, and administrative expenses (as a percent) 12.80% 12.00% 12.20% 11.60%
Operating income/(loss):        
Operating income $ 47,824 $ 46,204 $ 98,869 $ 107,855
Operating income (as a percent) 8.20% 8.10% 8.20% 9.30%
U.S. Services | Operating Segments        
Revenue:        
Revenue $ 449,703 $ 398,077 $ 889,181 $ 784,494
Gross profit:        
Gross profit $ 86,016 $ 84,971 $ 169,614 $ 174,670
Gross profit (as a percent) 19.10% 21.30% 19.10% 22.30%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 43,415 $ 38,273 $ 89,257 $ 73,375
Selling, general, and administrative expenses (as a percent) 9.70% 9.60% 10.00% 9.40%
Operating income/(loss):        
Operating income $ 42,601 $ 46,698 $ 80,357 $ 101,295
Operating income (as a percent) 9.50% 11.70% 9.00% 12.90%
Outside the U.S. | Operating Segments        
Revenue:        
Revenue $ 173,074 $ 205,961 $ 364,675 $ 388,549
Gross profit:        
Gross profit $ 19,713 $ 28,327 $ 58,168 $ 40,207
Gross profit (as a percent) 11.40% 13.80% 16.00% 10.30%
Selling, general, and administrative expenses:        
Selling, general, and administrative expenses $ 23,425 $ 24,011 $ 51,814 $ 45,351
Selling, general, and administrative expenses (as a percent) 13.50% 11.70% 14.20% 11.70%
Operating income/(loss):        
Operating income $ (3,712) $ 4,316 $ 6,354 $ (5,144)
Operating income (as a percent) (2.10%) 2.10% 1.70% (1.30%)
Other | Operating Segments        
Operating income/(loss):        
Operating income $ 325 $ 926 $ (247) $ (1,928)