Investments in Other Entities - Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents		$ 184,016		$ 184,016				$ 233,097			$ 193,470
Receivables, net		69,386		69,386				10,608
Loan receivable		0		0				4,000
Total assets	[1]	943,406		943,406				852,363
Liabilities and Stockholders’ Deficit
Current liabilities		156,191		156,191				115,371
Stockholders’ deficit		513,506	$ 440,321	513,506	$ 440,321	$ 485,845	$ 479,521	460,490	$ 404,582	$ 349,687	$ 330,911
Total liabilities, mezzanine equity, and stockholders’ equity		943,406		943,406				852,363
Statement of Operations
Revenue		317,001	227,117	849,955	578,815
Expenses		266,910	173,957	758,270	482,884
Income (loss) from operations		50,091	53,160	91,685	95,931
Other loss		(1,318)	500	2,328	(14,080)
Net income (loss)		27,396	$ (5,385)	50,060	68,603
LaSalle Medical Associates
Assets
Cash and cash equivalents		17,996		17,996				6,619
Restricted cash		699		699				696
Receivables, net		7,355		7,355				2,269
Loan receivable		2,250		2,250				2,250
Total assets		28,300		28,300				11,834
Liabilities and Stockholders’ Deficit
Current liabilities		33,468		33,468				32,405
Stockholders’ deficit		(5,168)		(5,168)				(20,571)
Total liabilities, mezzanine equity, and stockholders’ equity		$ 28,300		28,300				$ 11,834
Statement of Operations
Revenue				190,731	144,417
Expenses				180,696	155,786
Income (loss) from operations				10,035	(11,369)
Other loss				(48)	0
Net income (loss)				$ 9,987	$ (11,369)

[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 $590.7 million and $567.0 million as of September 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 $129.2 million and $91.7 million as of September 30, 2022 and December 31, 2021, respectively. The VIE balances do not include $435.9 million of investment in affiliates and $37.8 million of amounts due from affiliates as of September 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.