Quarterly report pursuant to Section 13 or 15(d)

Business Segments - Financial Information by Segment (Details)

v3.25.0.1
Business Segments - Financial Information by Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Revenue:    
Revenue $ 1,402,675 $ 1,327,041
Gross profit:    
Gross profit $ 301,557 $ 300,054
Gross profit (as a percent) 21.50% 22.60%
Selling, general, and administrative expenses:    
Selling, general, and administrative expenses $ 191,735 $ 169,195
Selling, general, and administrative expenses (as a percent) 13.70% 12.70%
Divestiture-related charges $ 38,341 $ 1,018
Operating income/(loss):    
Operating income $ 86,787 $ 107,510
Operating income (as a percent) 6.20% 8.10%
Amortization of Intangible Assets $ (23,035) $ (23,349)
Divestiture-related charges (38,341) (1,018)
Operating Segments | U.S. Federal Services    
Revenue:    
Revenue 780,655 677,078
Gross profit:    
Gross profit $ 173,315 $ 156,662
Gross profit (as a percent) 22.20% 23.10%
Selling, general, and administrative expenses:    
Selling, general, and administrative expenses $ 74,215 $ 87,855
Selling, general, and administrative expenses (as a percent) 9.50% 13.00%
Operating income/(loss):    
Operating income $ 99,100 $ 68,807
Operating income (as a percent) 12.70% 10.20%
Operating Segments | U.S. Services    
Revenue:    
Revenue $ 452,250 $ 489,845
Gross profit:    
Gross profit $ 95,004 $ 118,363
Gross profit (as a percent) 21.00% 24.20%
Selling, general, and administrative expenses:    
Selling, general, and administrative expenses $ 54,158 $ 52,300
Selling, general, and administrative expenses (as a percent) 12.00% 10.70%
Operating income/(loss):    
Operating income $ 40,846 $ 66,063
Operating income (as a percent) 9.00% 13.50%
Operating Segments | Outside the U.S.    
Revenue:    
Revenue $ 169,770 $ 160,118
Gross profit:    
Gross profit $ 33,238 $ 25,029
Gross profit (as a percent) 19.60% 15.60%
Selling, general, and administrative expenses:    
Selling, general, and administrative expenses $ 25,118 $ 25,141
Selling, general, and administrative expenses (as a percent) 14.80% 15.70%
Operating income/(loss):    
Operating income $ 8,120 $ (112)
Operating income (as a percent) 4.80% (0.10%)
Segment Reconciling Items    
Selling, general, and administrative expenses:    
Selling, general, and administrative expenses $ (97) $ 2,881
Divestiture-related charges 38,341 1,018
Operating income/(loss):    
Amortization of Intangible Assets (23,035) (23,349)
Divestiture-related charges (38,341) (1,018)
Other $ 97 $ (2,881)