Acquisitions and Disposals	6 Months Ended
Acquisitions and Disposals	Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Acquisitions and Disposals	Acquisitions and Disposals During the six months ended June 30, 2022, the Company acquired a controlling interest in four surgical facilities, two of which were merged into existing surgical facilities, for aggregate cash consideration of $74.9 million, net of cash acquired, and non-cash consideration of $2.6 million, which consisted of a non-controlling interest in one of the Company's existing surgical facilities. In connection with the acquisitions the Company preliminarily recognized non-controlling interests of $41.5 million and goodwill of $114.4 million. During the six months ended June 30, 2021, the Company acquired a controlling interest in a surgical facility in a new market and two surgical facilities in existing markets that were merged into existing facilities for aggregate cash consideration of $15.2 million, net of cash acquired. In connection with the acquisitions the Company preliminarily recognized non-controlling interests of $7.5 million and goodwill of $20.0 million. During the six months ended June 30, 2022, no significant changes were made to the purchase price allocation of assets and liabilities, existing at the date of acquisition, related to individual acquisitions completed in 2021. Other Acquisitions During the six months ended June 30, 2022, the Company acquired non-controlling interests in five surgical facilities and four in-development de novo surgical facilities for an aggregate cash purchase price of $65.8 million. The non-controlling interests were accounted for as equity method investments and recorded as a component of investments in and advances to affiliates in the accompanying condensed consolidated balance sheets. Disposals and Deconsolidations During the six months ended June 30, 2022, the Company sold its interests in a surgical facility, which was previously accounted for as an equity method investment, for net cash proceeds of $11.5 million. The Company recognized a pre-tax loss on the sale of $0.4 million included in loss on disposals and deconsolidations, net in the condensed consolidated statements of operations for the six months ended June 30, 2022. During the six months ended June 30, 2022, the Company contributed its interests in two surgical facilities as non-cash consideration for non-controlling interests in two new separate entities. As a result of these transactions, the Company lost control of the previously controlled surgical facilities but retains a non-controlling interest in each, resulting in the deconsolidation of the previously consolidated entities. The remaining non-controlling interests were accounted for as equity method investments, and initially measured and recorded at fair value as of the dates of the transactions. The fair value measurement utilizes Level 3 inputs, which includes unobservable data, to measure the fair value of the retained non-controlling interests. The fair value determination was based on a combination of multiple valuation methods, which included discounted cash flow and market value approach, which incorporates estimates of future earnings and market valuation multiples for certain guideline companies. The preliminary fair value of the investments of $9.8 million was recorded as a component of investments in and advances to affiliates in the accompanying condensed consolidated balance sheets. Further, based on the preliminary valuation, the transactions resulted in a pretax net loss on deconsolidations of $5.6 million, which is included in loss on disposals and deconsolidations, net, in the accompanying condensed consolidated statement of operations for the six months ended June 30, 2022. The net loss was determined based on the difference between the fair value of the Company's retained interests in the entities and the carrying values of both the tangible and intangible assets of the entities immediately prior to the transactions.