v3.26.1
Reportable Segments - Summary of Financial Information of Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 29, 2026
Mar. 30, 2025
Dec. 29, 2024
Mar. 29, 2026
Mar. 30, 2025
Segment Reporting Information [Line Items]            
Total consolidated revenue   $ 1,220,157 $ 1,322,113   $ 2,430,820 $ 2,742,674
Total consolidated subcontractor costs   (170,524) (218,408)   (344,011) (441,639)
Other segment items   (902,727) (954,831)   (1,789,568) (1,991,202)
Segment operating income   131,523 39,603   272,517 62,129
Reconciliation of profit (segment operating income):            
Other non-operating income   4,651 0   12,361 0
Legal contingency costs   0 0 $ (115,000) 0 (115,000)
Impairment of goodwill $ 0 0 (92,416)   0 (92,416)
Contingent consideration – fair value adjustments   58 1,931   7,506 2,297
Interest expense, net   (8,838) (8,491)   (15,966) (15,709)
Other corporate expenses   (15,441) (18,786)   (32,230) (42,585)
Income before income tax expense   127,336 31,112   268,912 46,420
Depreciation expense related to property and equipment   5,600 5,200   11,200 10,600
Amortization expense for intangible assets   8,800 8,600   17,200 19,300
Stock-based compensation expense   9,500 8,900   17,700 17,000
GSG            
Segment Reporting Information [Line Items]            
Other segment items   (383,610) (484,529)   (744,296) (1,039,983)
Reconciliation of profit (segment operating income):            
Depreciation expense related to property and equipment   800 900   1,600 1,800
Income (loss) from equity method investments   (100) 300   100 700
CIG            
Segment Reporting Information [Line Items]            
Other segment items   (519,117) (470,302)   (1,045,272) (951,219)
Reconciliation of profit (segment operating income):            
Depreciation expense related to property and equipment   4,700 4,300   9,400 8,700
Income (loss) from equity method investments   600 900   1,000 1,300
Operating Segments Excluding Intersegment Elimination            
Segment Reporting Information [Line Items]            
Total consolidated revenue   1,220,157 1,322,113   2,430,820 2,742,674
Total consolidated subcontractor costs   (170,524) (218,408)   (344,011) (441,639)
Operating Segments Excluding Intersegment Elimination | GSG            
Segment Reporting Information [Line Items]            
Total consolidated revenue   551,364 693,645   1,064,842 1,477,626
Total consolidated subcontractor costs   (93,558) (125,350)   (179,971) (261,006)
Operating Segments Excluding Intersegment Elimination | CIG            
Segment Reporting Information [Line Items]            
Total consolidated revenue   668,793 628,468   1,365,978 1,265,048
Total consolidated subcontractor costs   (76,966) (93,058)   (164,040) (180,633)
Intersegment Eliminations            
Segment Reporting Information [Line Items]            
Total consolidated revenue   (15,317) (14,446)   (34,339) (30,139)
Total consolidated subcontractor costs   (15,317) (14,446)   (34,339) (30,139)
Intersegment Eliminations | GSG            
Segment Reporting Information [Line Items]            
Total consolidated revenue   (7,987) (5,228)   (20,017) (12,599)
Total consolidated subcontractor costs   (7,330) (9,218)   (14,322) (17,540)
Intersegment Eliminations | CIG            
Segment Reporting Information [Line Items]            
Total consolidated revenue   (7,330) (9,218)   (14,322) (17,540)
Total consolidated subcontractor costs   (7,987) (5,228)   (20,017) (12,599)
Operating Segments            
Segment Reporting Information [Line Items]            
Total consolidated revenue   1,235,474 1,336,559   2,465,159 2,772,813
Total consolidated subcontractor costs   (185,841) (232,854)   (378,350) (471,778)
Segment operating income   146,906 148,874   297,241 309,833
Operating Segments | GSG            
Segment Reporting Information [Line Items]            
Total consolidated revenue   559,351 698,873   1,084,859 1,490,225
Total consolidated subcontractor costs   (100,888) (134,568)   (194,293) (278,546)
Segment operating income   74,853 79,776   146,270 171,696
Operating Segments | CIG            
Segment Reporting Information [Line Items]            
Total consolidated revenue   676,123 637,686   1,380,300 1,282,588
Total consolidated subcontractor costs   (84,953) (98,286)   (184,057) (193,232)
Segment operating income   72,053 69,098   150,971 138,137
Corporate            
Reconciliation of profit (segment operating income):            
Amortization expense for intangible assets   8,800 8,600   17,200 19,300
Stock-based compensation expense   $ 5,800 $ 5,000   $ 10,800 $ 9,800