Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2022
Property Plant And Equipment [Line Items]
Acquisition of Non Medical Assets	100.00%
Goodwill Impairment	$ 0	$ 0	$ 0
Advertising expense	9,399,000	8,632,000	11,696,000
Amortization of discount and debt issue costs	$ 2,101,000	$ 1,949,000	$ 1,797,000
Tax benefit percentage	9.80%	7.40%	7.80%
Concentration Risk, Benchmark Description	The Company does not have any individual customer that exceeded 10% of the Company’s patient accounts receivable balance at December 31, 2023 and 2022. Two payors individually exceeded 10% of the Company’s patients accounts receivable balance at December 31, 2023 and 2022. These payors comprise 17% and 15%, of the patient accounts receivable balance, respectively, as of December 31, 2023, and 16% and 16%, respectively, as of December 31, 2022.
Retirement benefits, description	The Company 401(k) Plan provides for a 401(k) matching program under which the Company will match 100% of the employees’ contribution up to 3% of the employees’ compensation, plus 50% of salary deferrals between 3% and 5% of employees’ compensation. The matching contribution is subject to certain eligibility and vesting conditions.
Retirement expense	$ 18,846,000	$ 15,746,000	$ 11,375,000
Expiration Period	10 years
Impairment of assets		0	0
Operating lease liabilities, current	$ 46,475,000	38,824,000
Operating lease liabilities, noncurrent	181,357,000	212,586,000
Right-of-use assets	$ 170,703,000	199,431,000
ASU 2016-02
Property Plant And Equipment [Line Items]
Operating lease liabilities, current				$ 16,753,000
Operating lease liabilities, noncurrent				200,247,000
Right-of-use assets				$ 190,013,000
Time Based Option
Property Plant And Equipment [Line Items]
Vesting Period	4 years
Percentage of option shares	25.00%
Performance Shares
Property Plant And Equipment [Line Items]
Vesting Period	4 years
Percentage of option shares	25.00%
Interest Expense
Property Plant And Equipment [Line Items]
Amortization of discount and debt issue costs	$ 2,101,000	$ 3,720,000	$ 7,417,000
Leasehold Improvements | Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives	5 years
Leasehold Improvements | Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives	10 years
Accounts Receivable | Customer Concentration Risk | Payor One
Property Plant And Equipment [Line Items]
Percentage of total revenue	17.00%	16.00%
Accounts Receivable | Customer Concentration Risk | Payor Two
Property Plant And Equipment [Line Items]
Percentage of total revenue	15.00%	16.00%