Investments in Other Entities - Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents		$ 234,223		$ 234,223			$ 233,097		$ 193,470
Receivables, net		67,263		67,263			10,608
Loan receivable		0		0			4,000
Total assets	[1]	951,064		951,064			852,363
Liabilities and Stockholders’ Deficit
Current liabilities		185,238		185,238			115,371
Stockholders’ deficit		485,845	$ 404,582	485,845	$ 404,582	$ 479,521	460,490	$ 349,687	$ 330,911
Total liabilities, mezzanine equity, and stockholders’ equity		951,064		951,064			852,363
Statement of Operations
Revenue		269,697	175,638	532,954	351,696
Expenses		254,315	154,650	491,360	308,926
Income (loss) from operations		15,382	20,988	41,594	42,770
Other loss		3,034	(15,883)	3,647	(14,579)
Net income		10,591	$ 59,530	22,664	73,988
LaSalle Medical Associates
Assets
Cash and cash equivalents		16,250		16,250			6,619
Restricted cash		698		698			696
Receivables, net		5,516		5,516			2,269
Loan receivable		2,250		2,250			2,250
Total assets		24,714		24,714			11,834
Liabilities and Stockholders’ Deficit
Current liabilities		35,266		35,266			32,405
Stockholders’ deficit		(10,552)		(10,552)			(20,571)
Total liabilities, mezzanine equity, and stockholders’ equity		$ 24,714		24,714			$ 11,834
Statement of Operations
Revenue				126,067	95,212
Expenses				121,406	104,570
Income (loss) from operations				4,661	(9,358)
Other loss				(58)	0
Net income				$ 4,603	$ (9,358)

[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 $599.7 million and $567.0 million as of June 30, 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 $143.7 million and $91.7 million as of June 30, 2022 and December 31, 2021, respectively. The VIE balances do not include $431.3 million of investment in affiliates and $36.0 million of amounts due from affiliates as of June 30, 2022 and $802.8 million of investment in affiliates and $6.6 million of amounts due from 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.