Investments in Other Entities — Equity Method - Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents		$ 177,287	$ 152,441	$ 177,287	$ 152,441		$ 193,470		$ 103,189
Receivables, net		16,540		16,540			7,058
Land, property, and equipment, net		40,738		40,738			29,890
Loan receivable		4,000		4,000			0
Total assets	[1]	894,430		894,430			817,486
Liabilities and Stockholders’ Deficit
Current liabilities		128,088		128,088			114,992
Stockholders’ deficit		404,582	207,848	404,582	207,848	$ 349,687	330,911	$ 197,961	$ 192,335
Total liabilities, mezzanine equity, and stockholders’ equity		894,430		894,430			817,486
Statements of Operations
Revenues		175,638	165,169	351,696	330,274
Expenses		154,650	152,263	308,926	313,003
Income from operations		20,988	12,906	42,770	17,271
Other income		67,886	1,282	69,190	1,384
Provision for income tax		24,920	31,858	31,696	33,453
Net loss		59,530	$ 81,001	73,988	83,988
LaSalle Medical Associates
Assets
Cash and cash equivalents		0		0			9,350
Restricted cash		694		694			691
Receivables, net		6,300		6,300			3,918
Other current assets		0		0			881
Loan receivable		2,250		2,250			2,250
Total assets		9,244		9,244			17,090
Liabilities and Stockholders’ Deficit
Current liabilities		23,101		23,101			21,589
Stockholders’ deficit		(13,857)		(13,857)			(4,499)
Total liabilities, mezzanine equity, and stockholders’ equity		9,244		9,244			17,090
Statements of Operations
Revenues				95,212	92,113
Expenses				104,570	93,680
Net loss				(9,358)	(1,567)
531 W. College LLC
Assets
Cash and cash equivalents		305		305			648
Other current assets		0		0			17
Other assets		172		172			70
Land, property, and equipment, net		33,693		33,693			33,697
Total assets		34,170		34,170			34,432
Liabilities and Stockholders’ Deficit
Current liabilities		0		0			32
Stockholders’ deficit		34,170		34,170			34,400
Total liabilities, mezzanine equity, and stockholders’ equity		$ 34,170		34,170			$ 34,432
Statements of Operations
Revenues				116	0
Expenses				344	579
Income from operations				(228)	(579)
Other income				0	21
Provision for income tax				2	0
Net loss				$ (230)	$ (558)

[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 $1,347.6 million and $801.3 million as of June 30, 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 $107.1 million and $111.3 million as of June 30, 2021 and December 31, 2020, respectively. See Note 15 – Variable Interest Entities (VIEs) for further detail.