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Segment Reporting - Summary of Financial Information of Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]      
Revenue $ 2,228,176 $ 2,072,653  
Segment expenses (1,541,577) (1,442,518)  
Segment EBITDA $ 686,599 $ 630,135  
Segment EBITDA margin 30.80% 30.40%  
Depreciation and amortization $ (289,949) $ (262,981)  
Other segment items (83,673) (78,614)  
Income before income tax provision 312,977 288,540  
Capital expenditures 212,455 169,951  
Total assets 20,254,497 19,082,660 $ 19,817,809
Intercompany Revenue      
Segment Reporting Information [Line Items]      
Revenue (309,713) (293,741)  
Reportable Segments      
Segment Reporting Information [Line Items]      
Revenue 2,537,889 2,366,394  
Corporate      
Segment Reporting Information [Line Items]      
Segment expenses (13,740) (11,133)  
Segment EBITDA (13,740) (11,133)  
Depreciation and amortization (2,466) (3,720)  
Other segment items (76,327) (77,207)  
Capital expenditures 8,112 3,064  
Total assets 482,562 455,822  
Western      
Segment Reporting Information [Line Items]      
Revenue 438,401 422,249  
Western | Intercompany Revenue      
Segment Reporting Information [Line Items]      
Revenue (61,300) (54,454)  
Western | Reportable Segments      
Segment Reporting Information [Line Items]      
Revenue 499,701 476,703  
Segment expenses (326,056) (309,199)  
Segment EBITDA $ 112,345 $ 113,050  
Segment EBITDA margin 25.60% 26.80%  
Depreciation and amortization $ (51,998) $ (51,221)  
Other segment items 191 (1,413)  
Capital expenditures 34,294 37,043  
Total assets 3,485,974 3,434,367  
Southern      
Segment Reporting Information [Line Items]      
Revenue 453,403 418,946  
Southern | Intercompany Revenue      
Segment Reporting Information [Line Items]      
Revenue (54,265) (55,007)  
Southern | Reportable Segments      
Segment Reporting Information [Line Items]      
Revenue 507,668 473,953  
Segment expenses (304,703) (290,534)  
Segment EBITDA $ 148,700 $ 128,412  
Segment EBITDA margin 32.80% 30.70%  
Depreciation and amortization $ (55,860) $ (44,707)  
Other segment items (5,252) (538)  
Capital expenditures 32,453 25,966  
Total assets 4,214,215 3,500,113  
Eastern      
Segment Reporting Information [Line Items]      
Revenue 403,270 360,063  
Eastern | Intercompany Revenue      
Segment Reporting Information [Line Items]      
Revenue (77,262) (71,906)  
Eastern | Reportable Segments      
Segment Reporting Information [Line Items]      
Revenue 480,532 431,969  
Segment expenses (300,175) (265,047)  
Segment EBITDA $ 103,095 $ 95,016  
Segment EBITDA margin 25.60% 26.40%  
Depreciation and amortization $ (56,202) $ (53,548)  
Other segment items (1,842) (362)  
Capital expenditures 39,718 39,042  
Total assets 3,678,666 3,281,517  
Central      
Segment Reporting Information [Line Items]      
Revenue 373,383 360,927  
Central | Intercompany Revenue      
Segment Reporting Information [Line Items]      
Revenue (41,603) (42,159)  
Central | Reportable Segments      
Segment Reporting Information [Line Items]      
Revenue 414,986 403,086  
Segment expenses (241,674) (235,005)  
Segment EBITDA $ 131,709 $ 125,922  
Segment EBITDA margin 35.30% 34.90%  
Depreciation and amortization $ (42,427) $ (40,787)  
Other segment items (142) 803  
Capital expenditures 45,972 29,442  
Total assets 2,835,804 2,793,648  
Canada      
Segment Reporting Information [Line Items]      
Revenue 302,731 280,362  
Canada | Intercompany Revenue      
Segment Reporting Information [Line Items]      
Revenue (29,801) (26,984)  
Canada | Reportable Segments      
Segment Reporting Information [Line Items]      
Revenue 332,532 307,346  
Segment expenses (167,159) (159,001)  
Segment EBITDA $ 135,572 $ 121,361  
Segment EBITDA margin 44.80% 43.30%  
Depreciation and amortization $ (45,825) $ (39,109)  
Other segment items 99 44  
Capital expenditures 31,750 18,667  
Total assets 3,547,500 3,625,769  
MidSouth      
Segment Reporting Information [Line Items]      
Revenue 256,988 230,106  
MidSouth | Intercompany Revenue      
Segment Reporting Information [Line Items]      
Revenue (45,482) (43,231)  
MidSouth | Reportable Segments      
Segment Reporting Information [Line Items]      
Revenue 302,470 273,337  
Segment expenses (188,070) (172,599)  
Segment EBITDA $ 68,918 $ 57,507  
Segment EBITDA margin 26.80% 25.00%  
Depreciation and amortization $ (35,171) $ (29,889)  
Other segment items (400) 59  
Capital expenditures 20,156 16,727  
Total assets $ 2,009,776 $ 1,991,424