Acquisitions, Divestitures, and Joint Venture Activities - Price Allocation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Recognized amounts of identifiable assets acquired and liabilities assumed
Goodwill	$ 1,765,778	$ 1,748,426	$ 1,259,147
2022 Acquisitions
Consideration
Cash	23,552
Recognized amounts of identifiable assets acquired and liabilities assumed
Operating lease right of use asset	17
Accounts payable and other accrued liabilities	(630)
Salaries, wages, and benefits payable	(496)
Current operating lease payable	(17)
Total identifiable assets and liabilities	4,157
Noncontrolling interest	1,788
Goodwill	21,183
Goodwill, noncontrolling interest portion		$ 1,266
2022 Acquisitions | Non-compete agreements
Recognized amounts of identifiable assets acquired and liabilities assumed
Non-compete agreements	254
Trade names | 2022 Acquisitions
Recognized amounts of identifiable assets acquired and liabilities assumed
Indefinite-lived intangible assets	2,881
Certificates of need/licenses | 2022 Acquisitions
Recognized amounts of identifiable assets acquired and liabilities assumed
Indefinite-lived intangible assets	$ 2,148