Investments in Other Entities — Equity Method - Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents		$ 205,876	$ 80,892	$ 193,470	$ 103,189
Receivables, net		16,448		7,058
Property and equipment, net		29,609		29,890
Total assets	[1]	843,280		817,486
Liabilities and Stockholders’ Deficit
Current liabilities		126,347		114,992
Stockholders’ deficit		349,687	197,961	330,911	$ 192,335
Total liabilities and stockholders’ deficit		843,280		817,486
Statements of Operations
Revenues		176,058	165,105
Expenses		154,277	160,740
Income (Loss) from operations		21,781	4,365
Other income		1,304	102
Provision (benefit) from income taxes		6,776	1,595
Net loss		14,458	2,987
LaSalle Medical Associates
Assets
Cash and cash equivalents		1,756		9,350
Restricted cash		693		691
Receivables, net		5,939		3,918
Other current assets		880		881
Loan receivable		2,250		2,250
Total assets		11,518		17,090
Liabilities and Stockholders’ Deficit
Current liabilities		17,570		21,589
Stockholders’ deficit		(6,052)		(4,499)
Total liabilities and stockholders’ deficit		11,518		17,090
Statements of Operations
Revenues		47,224	46,304
Expenses		48,776	48,730
Net loss		(1,552)	(2,426)
531 W. College LLC
Assets
Cash and cash equivalents		317		648
Other current assets		8		17
Other assets		165		70
Property and equipment, net		33,697		33,697
Total assets		34,187		34,432
Liabilities and Stockholders’ Deficit
Current liabilities		0		32
Stockholders’ deficit		34,187		34,400
Total liabilities and stockholders’ deficit		34,187		$ 34,432
Statements of Operations
Revenues		0	0
Expenses		211	338
Income (Loss) from operations		(211)	(338)
Other income		0	21
Provision (benefit) from income taxes		1	0
Net loss		$ (212)	$ (317)

[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 $929.9 million and $801.3 million as of March 31, 2021 and December 31, 2020, 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 $115.3 million and $111.3 million as of March 31, 2021 and December 31, 2020, respectively. See Note 14 – Variable Interest Entities (VIEs) for further detail.