CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
TOTAL REVENUE	$ 252,589	$ 203,095
OPERATING EXPENSES
Center costs, excluding depreciation and amortization shown separately below	182,987	148,893
General and administrative expenses	84,626	103,369
Depreciation and amortization	19,069	15,684
Total operating expenses	286,682	267,946
LOSS FROM OPERATIONS	(34,093)	(64,851)
OTHER INCOME (EXPENSE)
Gain (loss) on remeasurement of contingent consideration	1,037	(434)
Transaction costs	(86)	(278)
Interest expense, net	(5,092)	(3,441)
Other expense	(45)	0
Total other expense	(4,186)	(4,153)
LOSS BEFORE INCOME TAXES	(38,279)	(69,004)
INCOME TAX BENEFIT	4,037	6,676
NET LOSS	$ (34,242)	$ (62,328)
NET LOSS PER SHARE, BASIC	$ (0.09)	$ (0.18)
NET LOSS PER SHARE, DILUTED	$ (0.09)	$ (0.18)
Weighted-average shares, basic net loss per share	360,902	350,849
Weighted-average shares, diluted net loss per share	360,902	350,849
NET LOSS	$ (34,242)	$ (62,328)
OTHER COMPREHENSIVE LOSS
Unrealized losses on cash flow hedge, net of tax	(1,270)	0
COMPREHENSIVE LOSS	$ (35,512)	$ (62,328)