Investments in Other Entities - Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents		$ 237,942		$ 233,097	$ 193,470
Receivables, net		55,280		10,608
Loan receivable		4,000		4,000
Total assets	[1]	912,331		852,363
Liabilities and Stockholders’ Deficit
Current liabilities		160,436		115,371
Stockholders’ deficit		479,521	$ 349,687	460,490	$ 330,911
Total liabilities, mezzanine equity, and stockholders’ equity		912,331		852,363
Statement of Operations
Revenue		263,258	176,058
Expenses		237,047	154,277
Net income		12,073	14,458
LaSalle Medical Associates
Assets
Cash and cash equivalents		10,712		6,619
Restricted cash		698		696
Receivables, net		6,080		2,269
Loan receivable		2,250		2,250
Total assets		19,740		11,834
Liabilities and Stockholders’ Deficit
Current liabilities		34,530		32,405
Stockholders’ deficit		(14,790)		(20,571)
Total liabilities, mezzanine equity, and stockholders’ equity		19,740		$ 11,834
Statement of Operations
Revenue		67,566	47,224
Expenses		61,786	48,776
Net income		$ 5,780	$ (1,552)

[1] The Company’s consolidated balance sheets include the assets and liabilities of its consolidated VIEs. The consolidated balance sheets include total assets that can be used only to settle obligations of the Company’s consolidated VIEs totaling $585.9 million and $567.0 million as of March 31, 2022 and December 31, 2021, respectively, and total liabilities of the Company’s consolidated VIEs for which creditors do not have recourse to the general credit of the primary beneficiary of $111.0 million and $91.7 million as of March 31, 2022 and December 31, 2021, respectively. The VIE balances do not include $529.6 million of investment in affiliates and $25.2 million of amounts due from affiliates as of March 31, 2022 and $802.8 million of investment in affiliates and $6.6 million of amounts due to affiliates as of December 31, 2021 as these are eliminated upon consolidation and not presented within the consolidated balance sheets. See Note 16 – Variable Interest Entities (VIEs) for further detail.