v3.25.2
SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]          
Gross revenues $ 465,334 $ 377,163 $ 882,435 $ 718,170  
Cost of operations 308,070 243,787 588,521 474,578  
General and administration 54,523 47,184 111,009 91,517  
Depreciation and amortization 77,006 55,338 148,497 109,375  
Expense from acquisition activities 6,463 7,836 11,992 12,847  
Operating income 19,272 23,018 22,416 29,853  
Interest expense, net 13,000 12,697 24,598 25,767  
Other income (615) (477) (933) (828)  
Income (loss) before income taxes 6,887 10,798 (1,249) 4,914  
Capital expenditures 66,403 44,649 121,878 74,900  
Total assets 3,256,911 2,511,865 3,256,911 2,511,865 $ 3,230,068
Solid waste          
Segment Reporting Information [Line Items]          
Gross revenues 373,624 293,945 708,528 559,881  
Solid waste | Eastern          
Segment Reporting Information [Line Items]          
Gross revenues 120,924 113,533 225,664 213,723  
Solid waste | Western          
Segment Reporting Information [Line Items]          
Gross revenues 170,134 137,312 322,451 260,956  
Solid waste | Mid-Atlantic          
Segment Reporting Information [Line Items]          
Gross revenues 82,566 43,100 160,413 85,202  
Resource Solutions          
Segment Reporting Information [Line Items]          
Gross revenues 91,710 83,218 173,907 158,289  
Inter-company revenue          
Segment Reporting Information [Line Items]          
Gross revenues (97,121) (83,043) (178,795) (155,303)  
Cost of operations (97,121) (83,043) (178,795) (155,303)  
Inter-company revenue | Solid waste          
Segment Reporting Information [Line Items]          
Gross revenues 92,991 80,208 171,189 149,345  
Inter-company revenue | Solid waste | Eastern          
Segment Reporting Information [Line Items]          
Gross revenues 30,583 28,322 55,157 52,611  
Inter-company revenue | Solid waste | Western          
Segment Reporting Information [Line Items]          
Gross revenues 58,963 51,203 110,774 95,570  
Inter-company revenue | Solid waste | Mid-Atlantic          
Segment Reporting Information [Line Items]          
Gross revenues 3,445 683 5,258 1,164  
Inter-company revenue | Resource Solutions          
Segment Reporting Information [Line Items]          
Gross revenues 4,130 2,835 7,606 5,958  
Operating Segments | Solid waste          
Segment Reporting Information [Line Items]          
Gross revenues 466,615 374,153 879,717 709,226  
Cost of operations 328,490 257,613 620,097 496,171  
General and administration 20,454 16,469 39,676 32,945  
Depreciation and amortization 70,012 49,816 134,742 98,083  
Expense from acquisition activities 3,635 6,177 7,288 9,973  
Operating income 44,024 44,078 77,914 72,054  
Interest expense, net 571 354 1,073 769  
Capital expenditures 60,717 37,628 109,653 60,784  
Total assets 2,679,574 1,968,739 2,679,574 1,968,739  
Operating Segments | Solid waste | Eastern          
Segment Reporting Information [Line Items]          
Gross revenues 151,507 141,855 280,821 266,334  
Cost of operations 107,942 100,596 201,882 193,094  
General and administration 5,718 6,575 11,771 12,734  
Depreciation and amortization 17,816 14,986 33,925 29,397  
Expense from acquisition activities 165 26 560 245  
Operating income 19,866 19,672 32,683 30,864  
Interest expense, net 306 217 532 418  
Capital expenditures 18,820 9,433 26,923 16,474  
Total assets 552,443 473,975 552,443 473,975  
Operating Segments | Solid waste | Western          
Segment Reporting Information [Line Items]          
Gross revenues 229,097 188,515 433,225 356,526  
Cost of operations 155,002 126,223 293,497 241,916  
General and administration 9,008 7,979 18,177 15,950  
Depreciation and amortization 32,761 24,279 63,121 47,570  
Expense from acquisition activities 608 89 1,452 662  
Operating income 31,718 29,945 56,978 50,428  
Interest expense, net 220 145 441 358  
Capital expenditures 24,245 22,051 39,445 33,729  
Total assets 1,147,974 928,955 1,147,974 928,955  
Operating Segments | Solid waste | Mid-Atlantic          
Segment Reporting Information [Line Items]          
Gross revenues 86,011 43,783 165,671 86,366  
Cost of operations 65,546 30,794 124,718 61,161  
General and administration 5,728 1,915 9,728 4,261  
Depreciation and amortization 19,435 10,551 37,696 21,116  
Expense from acquisition activities 2,862 6,062 5,276 9,066  
Operating income (7,560) (5,539) (11,747) (9,238)  
Interest expense, net 45 (8) 100 (7)  
Capital expenditures 17,652 6,144 43,285 10,581  
Total assets 979,157 565,809 979,157 565,809  
Operating Segments | Resource Solutions          
Segment Reporting Information [Line Items]          
Gross revenues 95,840 86,053 181,513 164,247  
Cost of operations 76,286 69,026 146,319 133,295  
General and administration 5,576 4,861 10,117 9,521  
Depreciation and amortization 5,358 4,540 10,491 9,333  
Expense from acquisition activities 33 36 1,024 61  
Operating income 8,587 7,590 13,562 12,037  
Interest expense, net 27 35 53 64  
Capital expenditures 2,348 4,354 6,419 10,067  
Total assets 282,951 252,364 282,951 252,364  
Corporate Entities          
Segment Reporting Information [Line Items]          
Cost of operations 415 191 900 415  
General and administration 28,493 25,854 61,216 49,051  
Depreciation and amortization 1,636 982 3,264 1,959  
Expense from acquisition activities 2,795 1,623 3,680 2,813  
Operating income (33,339) (28,650) (69,060) (54,238)  
Interest expense, net 12,402 12,308 23,472 24,934  
Capital expenditures 3,338 2,667 5,806 4,049  
Total assets $ 294,386 $ 290,762 $ 294,386 $ 290,762