v3.26.1
Segment Reporting - Schedule of Operating Results by Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Revenues $ 901,625 $ 764,039 $ 1,761,842 $ 1,446,297
Research and Development Costs 4,167 4,565 8,266 6,578
(Gain) loss on asset disposals and impairments, net (2) 13 123 (4,418)
Total operating income 114,136 102,424 220,829 199,054
Other Income (Expense) (542) (4,665) 82 (9,478)
Income before Provision for Income Taxes 113,594 97,759 220,911 189,576
Equity in Income of Investees: 24,428 18,545 45,993 35,133
Total Capital Expenditures 41,431 32,729 83,937 66,098
Total Depreciation and Amortization 31,362 27,259 60,375 51,171
Government Operations        
Segment Reporting [Line Items]        
Total Segment Expenses 518,245 497,903 1,016,680 972,032
Commercial Operations        
Segment Reporting [Line Items]        
Total Segment Expenses 279,976 169,446 541,482 291,290
Operating Segments        
Segment Reporting [Line Items]        
Revenues 903,803 765,098 1,765,349 1,448,695
Total Segment Expenses 798,221 667,349 1,558,162 1,263,322
Total operating income 130,010 116,294 253,180 220,505
Total Capital Expenditures 39,557 32,471 80,940 64,180
Total Depreciation and Amortization 29,577 25,465 56,857 47,580
Operating Segments | Government Operations        
Segment Reporting [Line Items]        
Revenues 601,291 588,959 1,179,191 1,144,246
Research and Development Costs 3,004 1,924 5,968 3,375
(Gain) loss on asset disposals and impairments, net (3) 0 (3) (4,431)
Other segment expenses 515,244 495,979 1,010,715 973,088
Total operating income 105,678 109,417 204,819 207,163
Equity in Income of Investees: 22,633 18,362 42,308 34,950
Total Capital Expenditures 15,546 15,770 42,644 34,270
Total Depreciation and Amortization 20,758 19,222 39,290 37,318
Operating Segments | Commercial Operations        
Segment Reporting [Line Items]        
Revenues 302,512 176,139 586,158 304,449
Research and Development Costs 1,163 2,641 2,299 3,203
(Gain) loss on asset disposals and impairments, net 1 13 126 13
Other segment expenses 278,812 166,792 539,057 288,074
Total operating income 24,332 6,877 48,361 13,342
Equity in Income of Investees: 1,795 183 3,685 183
Total Capital Expenditures 24,011 16,701 38,296 29,910
Total Depreciation and Amortization 8,819 6,243 17,567 10,262
Eliminations        
Segment Reporting [Line Items]        
Revenues (2,178) (1,059) (3,507) (2,398)
Unallocated Corporate        
Segment Reporting [Line Items]        
Total operating income (15,874) (13,870) (32,351) (21,451)
Total Capital Expenditures 1,874 258 2,997 1,918
Total Depreciation and Amortization $ 1,785 $ 1,794 $ 3,518 $ 3,591