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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash Flows from Operating Activities:      
Net income $ 13,536 $ 25,399 $ 53,079
net income to net cash provided by operating activities:      
Depreciation and amortization 234,907 170,705 126,351
Interest accretion on landfill and environmental remediation liabilities 11,601 9,885 8,008
Amortization of debt issuance costs 2,960 2,962 1,903
Stock-based compensation 12,186 9,084 8,155
Operating lease right-of-use assets expense 17,784 15,318 13,804
Other items and charges, net 12,980 708 737
Loss from termination of bridge financing 0 8,191 0
Landfill capping (recovery) charge - veneer failure (889) 3,021 0
Deferred income taxes 6,894 7,392 16,527
Changes in assets and liabilities, net of effects of acquisitions and divestitures:      
Accounts receivable 1,253 (39,436) (7,101)
Landfill operating lease contract expenditures (5,486) (5,496) (5,486)
Accounts payable (13,634) 41,592 11,075
Prepaid expenses, inventories and other assets (12,519) (8,172) (11,054)
Accrued expenses, contract liabilities and other liabilities (218) (8,061) 1,316
Net cash provided by operating activities 281,355 233,092 217,314
Cash Flows from Investing Activities:      
Acquisitions, net of cash acquired (468,628) (851,839) (78,197)
Additions to intangible assets (280) 0 0
Additions to property and equipment (203,227) (154,907) (130,960)
Proceeds from sale of cost method investment 0 0 1,637
Proceeds from sale of property and equipment 1,380 1,110 600
Proceeds from property insurance settlement 146 0 0
Net cash used in investing activities (670,609) (1,005,636) (206,920)
Cash Flows from Financing Activities:      
Proceeds from debt borrowings 846,750 465,000 88,200
Principal payments on debt (783,684) (26,257) (59,211)
Payments of debt issuance costs (6,619) (12,759) (1,232)
Payments of contingent consideration 0 0 (1,000)
Proceeds from the exercise of share based awards 349 89 192
Proceeds from the public offering of Class A Common Stock 496,245 496,231 0
Payments of debt modification costs (1,396) 0 0
Net cash provided by financing activities 551,645 922,304 26,949
Net increase in cash, cash equivalents and restricted cash 162,391 149,760 37,343
Cash, cash equivalents and restricted cash, beginning of period 220,912 71,152 33,809
Cash, cash equivalents and restricted cash, end of period 383,303 220,912 71,152
Supplemental Disclosures of Cash Flow Information:      
Interest 61,217 43,588 21,003
Income tax payments 6,776 10,109 2,798
Supplemental Disclosures of Non-Cash Investing and Financing Activities:      
Non-current assets acquired through long-term financing obligations $ 30,551 $ 12,322 $ 11,919