v3.26.1
Segment Reporting - Segment Reporting Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Revenues:        
Revenues $ 1,007.0 $ 1,020.6 $ 1,975.3 $ 1,988.9
Costs of services 722.4 727.3 1,424.1 1,420.2
Gross Profit:        
Total Gross Profit 284.6 293.3 551.2 568.7
Selling, general, and administrative expenses 226.2 216.8 450.6 431.3
Amortization of intangible assets 17.3 16.9 31.8 31.2
Operating income 41.1 59.6 68.8 106.2
Interest Expense, Operating and Nonoperating 20.4 18.2 37.5 33.6
Income before income taxes 20.7 41.4 31.3 72.6
Provision for income taxes 6.5 12.1 11.6 22.4
Net income 14.2 29.3 19.7 50.2
Commercial        
Revenues:        
Revenues 701.7 708.1 1,377.2 1,380.3
Federal Government        
Revenues:        
Revenues 305.3 312.5 598.1 608.6
Operating Segments [Member]        
Revenues:        
Revenues 1,007.0 1,020.6 1,975.3 1,988.9
Costs of services 722.4 727.3 1,424.1 1,420.2
Gross Profit:        
Total Gross Profit 284.6 293.3 551.2 568.7
Other Depreciation and Amortization 13.2 10.5 26.1 21.0
Other Expenses 182.5 177.9 359.9 353.6
Selling, general, and administrative expenses 195.7 188.4 386.0 374.6
Amortization of intangible assets 17.3 16.9 31.8 31.2
Operating income 71.6 88.0 133.4 162.9
Operating Segments [Member] | Commercial        
Revenues:        
Revenues 701.7 708.1 1,377.2 1,380.3
Costs of services 476.8 474.7 943.1 929.2
Gross Profit:        
Total Gross Profit 224.9 233.4 434.1 451.1
Other Depreciation and Amortization 11.2 9.0 22.2 18.0
Other Expenses 154.8 149.3 305.6 295.3
Selling, general, and administrative expenses 166.0 158.3 327.8 313.3
Amortization of intangible assets 11.6 10.5 20.4 18.3
Operating income 47.3 64.6 85.9 119.5
Operating Segments [Member] | Federal Government        
Revenues:        
Revenues 305.3 312.5 598.1 608.6
Costs of services 245.6 252.6 481.0 491.0
Gross Profit:        
Total Gross Profit 59.7 59.9 117.1 117.6
Other Depreciation and Amortization 2.0 1.5 3.9 3.0
Other Expenses 27.7 28.6 54.3 58.3
Selling, general, and administrative expenses 29.7 30.1 58.2 61.3
Amortization of intangible assets 5.7 6.4 11.4 12.9
Operating income 24.3 23.4 47.5 43.4
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]        
Gross Profit:        
Corporate SG&A Expenses $ 30.5 $ 28.4 $ 64.6 $ 56.7