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SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]          
Revenues $ 295,268 $ 241,969 $ 812,962 $ 647,375  
Depreciation and amortization 32,527 27,491 93,106 74,510  
Operating income (loss) 36,288 27,387 78,175 61,343  
Total assets 1,399,347 1,280,397 1,399,347 1,280,397 $ 1,283,580
Operating | Eastern          
Segment Reporting Information [Line Items]          
Revenues 93,137 75,154 251,720 188,557  
Depreciation and amortization 11,907 9,407 34,895 23,342  
Operating income (loss) 10,061 5,374 13,981 11,401  
Total assets 361,950 352,067 361,950 352,067  
Operating | Western          
Segment Reporting Information [Line Items]          
Revenues 121,903 103,523 332,626 288,139  
Depreciation and amortization 16,778 15,710 47,376 44,838  
Operating income (loss) 22,405 15,805 51,565 38,462  
Total assets 725,232 673,608 725,232 673,608  
Operating | Resource Solutions          
Segment Reporting Information [Line Items]          
Revenues 80,228 63,292 228,616 170,679  
Depreciation and amortization 3,138 1,903 9,011 5,020  
Operating income (loss) 4,526 6,679 14,453 12,792  
Total assets 189,854 126,529 189,854 126,529  
Corporate Entities          
Segment Reporting Information [Line Items]          
Revenues 0 0 0 0  
Depreciation and amortization 704 471 1,824 1,310  
Operating income (loss) (704) (471) (1,824) (1,312)  
Total assets 122,311 128,193 122,311 128,193  
Inter-company revenues          
Segment Reporting Information [Line Items]          
Revenues (65,309) (54,447) (177,202) (148,430)  
Inter-company revenues | Eastern          
Segment Reporting Information [Line Items]          
Revenues (23,027) (18,768) (61,842) (47,322)  
Inter-company revenues | Western          
Segment Reporting Information [Line Items]          
Revenues (40,703) (35,523) (112,687) (97,771)  
Inter-company revenues | Resource Solutions          
Segment Reporting Information [Line Items]          
Revenues $ (1,579) $ (156) $ (2,673) $ (3,337)