Investments in Other Entities — Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2022		Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021		Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 288,027					$ 233,097					$ 288,027		$ 233,097		$ 193,470
Receivables, net	49,631					10,608					49,631		10,608
Loans receivable	996					0					996		0
Total assets	966,213	[1]	$ 954,896	$ 967,432	$ 922,659	867,361	[1]	$ 871,154	$ 895,717	$ 843,141	966,213	[1]	867,361	[1]
Liabilities and stockholders’ deficit
Current liabilities	148,610				155,542	114,719		115,173	125,873	122,553	148,610		114,719
Stockholders’ deficit	544,310					454,107					544,310		454,107		329,463	$ 192,335
Total liabilities, mezzanine equity, and stockholders’ equity	966,213					867,361					966,213		867,361
Statements of Operations
Revenues	294,208		317,001	269,697	263,258	195,100		227,117	175,638	176,058	1,144,163		773,915		687,180
Expenses	281,628		266,910	254,315	237,047	192,852		173,957	154,650	154,277	1,039,898		675,736		606,677
Income from operations	12,580		50,091	15,382	26,211	2,248		53,160	20,988	21,781	104,265		98,179		80,503
Other income (expense)											3,944		(3,750)		1,077
Net income	(883)		$ 23,897	$ 11,277	$ 11,450	(18,152)		$ (5,229)	$ 56,269	$ 13,167	45,741		46,055		122,083
LaSalle Medical Associates
Assets
Cash and cash equivalents	15,671					6,619					15,671		6,619
Receivables, net	5,064					2,269					5,064		2,269
Prepaid assets	5,032					0					5,032		0
Loans receivable	2,250					2,250					2,250		2,250
Restricted cash	700					696					700		696
Total assets	28,717					11,834					28,717		11,834
Liabilities and stockholders’ deficit
Current liabilities	30,331					32,405					30,331		32,405
Stockholders’ deficit	(1,614)					(20,571)					(1,614)		(20,571)
Total liabilities, mezzanine equity, and stockholders’ equity	$ 28,717					$ 11,834					28,717		11,834
Statements of Operations
Revenues											253,469		204,061		186,964
Expenses											239,884		220,132		185,724
Income from operations											13,585		(16,071)		1,240
Other income (expense)											(44)		0		8
Net income											$ 13,541		$ (16,071)		$ 1,248

[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 $523.7 million and $580.9 million as of December 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 $131.8 million and $94.8 million as of December 31, 2022 and December 31, 2021, respectively. These VIE balances do not include $304.8 million of investment in affiliates and $30.3 million of amounts due from affiliates as of December 31, 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 19 – “Variable Interest Entities (VIEs)” for further detail.