Investments in Other Entities — Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents		$ 193,470				$ 103,189				$ 193,470	$ 103,189	$ 106,892
Receivables, net		7,058				11,004				7,058	11,004
Loans receivable		50				22,925				50	22,925
Restricted cash		0				75				0	75
Property and equipment, net		29,890				12,130				29,890	12,130
Total assets	[1]	817,486				728,713				817,486	728,713
Liabilities and Stockholders’ Deficit
Current liabilities		114,992				105,424				114,992	105,424
Stockholders’ deficit		330,911				192,335				330,911	192,335	181,545	$ 164,183
Total liabilities and stockholders’ deficit		817,486				728,713				817,486	728,713
Statements of Operations
Revenues		176,783	$ 180,123	$ 165,169	$ 165,105	178,751	$ 156,060	$ 130,050	$ 95,757	687,180	560,618	519,908
Expenses										606,677	528,198	431,476
(Loss) income from operations		25,876	37,356	12,906	4,365	10,933	10,066	14,728	(3,307)	80,503	32,420	88,432
Other income										1,077	3,030	1,622
Income (loss) before income tax benefit										178,427	25,840	82,627
Income tax provision (benefit)										56,107	8,167	22,360
Net income		12,908	$ 25,424	$ 81,001	$ 2,987	(1,280)	$ 10,739	$ 10,664	$ (2,450)	122,320	17,673	$ 60,267
LaSalle Medical Associates
Assets
Cash and cash equivalents		9,350				6,345				9,350	6,345
Receivables, net		3,918				5,123				3,918	5,123
Other current assets		881				3,526				881	3,526
Loans receivable		2,250				2,250				2,250	2,250
Restricted cash		691				684				691	684
Total assets		17,090				17,928				17,090	17,928
Liabilities and Stockholders’ Deficit
Current liabilities		21,589				23,530				21,589	23,530
Stockholders’ deficit		(4,499)				(5,602)				(4,499)	(5,602)
Total liabilities and stockholders’ deficit		17,090				17,928				17,090	17,928
Statements of Operations
Revenues										186,964	194,020
Expenses										185,724	205,153
(Loss) income from operations										1,240	(11,133)
Other income										8	0
Income (loss) before income tax benefit										1,248	(11,133)
Income tax provision (benefit)										0	0
Net income										1,248	(11,133)
Universal Care, Inc.
Assets
Cash and cash equivalents						33,890					33,890
Receivables, net						63,843					63,843
Other current assets						38,280					38,280
Other Assets						882					882
Property and equipment, net						4,021					4,021
Total assets						140,916					140,916
Liabilities and Stockholders’ Deficit
Current liabilities						128,330					128,330
Other Liabilities						33,133					33,133
Stockholders’ deficit						(20,547)					(20,547)
Total liabilities and stockholders’ deficit						140,916					140,916
Statements of Operations
Revenues										195,308	500,375
Expenses										189,028	502,567
Income (loss) before income tax benefit										6,280	(2,192)
Income tax provision (benefit)										0	258
Net income										6,280	(2,450)
531 W. College, LLC – related party
Assets
Cash and cash equivalents		648				139				648	139
Other current assets		17				17				17	17
Other Assets		70				70				70	70
Property and equipment, net		33,697				33,581				33,697	33,581
Total assets		34,432				33,807				34,432	33,807
Liabilities and Stockholders’ Deficit
Current liabilities		32				1,061				32	1,061
Stockholders’ deficit		34,400				32,746				34,400	32,746
Total liabilities and stockholders’ deficit		$ 34,432				$ 33,807				34,432	33,807
Statements of Operations
Revenues										0	0
Expenses										1,053	1,010
(Loss) income from operations										(1,053)	(1,010)
Other income										64	475
Income tax provision (benefit)										3	0
Net income										$ (992)	$ (535)

[1] The Company's consolidated balance sheets include the assets and liabilities of its consolidated variable interest entities ("VIEs"). The consolidated balance sheets include total assets that can be used only to settle obligations of the Company’s consolidated VIEs totaling $801.3 million and $849.3 million as of December 31, 2020 and December 31, 2019, 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 $111.3 million and $114.5 million as of December 31, 2020 and December 31, 2019, respectively. See Note 18 – Variable Interest Entities (VIEs) for further detail.