UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 289,645	$ 283,666	$ 552,241	$ 517,693
Operating expenses:
Cost of operations	186,319	186,038	366,563	348,493
General and administration	35,865	33,562	71,544	63,354
Depreciation and amortization	34,924	31,150	68,359	60,579
Legal settlement	6,150	0	6,150	0
Expense from acquisition activities	3,677	1,019	6,540	3,062
Southbridge Landfill closure charge	96	178	206	318
Total operating expenses	267,031	251,947	519,362	475,806
Operating income	22,614	31,719	32,879	41,887
Other expense (income):
Interest income	(1,611)	(42)	(2,295)	(81)
Interest expense	9,001	5,698	15,959	10,902
Loss from termination of bridge financing	8,198	0	8,198	0
Other income	(452)	(312)	(800)	(457)
Other expense, net	15,136	5,344	21,062	10,364
Income before income taxes	7,478	26,375	11,817	31,523
Provision for income taxes	1,988	8,579	2,779	9,537
Net income	$ 5,490	$ 17,796	$ 9,038	$ 21,986
Basic earnings per share attributable to common stockholders:
Weighted average common shares outstanding, basic (in shares)	52,885	51,642	52,331	51,567
Basic earnings per common share (in dollars per share)	$ 0.10	$ 0.34	$ 0.17	$ 0.43
Diluted earnings per share attributable to common stockholders:
Weighted average common shares outstanding, diluted (in shares)	52,980	51,781	52,427	51,720
Diluted earnings per common share (in dollars per share)	$ 0.10	$ 0.34	$ 0.17	$ 0.43