Investments in Other Entities - Equity Method (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity Method Investments [Roll Forward]
Beginning Balance	$ 28,427,000
Allocation of Net Income (Loss)	3,694,000	$ (6,901,000)	$ (8,125,000)
Additional/ Initial Investment	15,394,000
Contribution	950,000
Sale	(5,173,000)
Ending Balance	43,292,000	28,427,000
LaSalle Medical Associates – IPA Line of Business
Equity Method Investments [Roll Forward]
Beginning Balance	6,396,000
Allocation of Net Income (Loss)	276,000
Additional/ Initial Investment	6,375,000
Contribution	0
Ending Balance	13,047,000	6,396,000
Pacific Medical Imaging & Oncology Center, Inc.
Equity Method Investments [Roll Forward]
Beginning Balance	1,396,000
Allocation of Net Income (Loss)	17,000
Contribution	0
Ending Balance	1,413,000	1,396,000
Universal Care, Inc.
Equity Method Investments [Roll Forward]
Beginning Balance	1,438,000
Allocation of Net Income (Loss)	3,560,000
Contribution	0
Sale	(4,998,000)
Ending Balance	0	1,438,000
Diagnostic Medical Group
Equity Method Investments [Roll Forward]
Beginning Balance	2,334,000
Allocation of Net Income (Loss)	279,000
Contribution	0
Ending Balance	2,613,000	2,334,000
531 W. College, LLC – related party
Equity Method Investments [Roll Forward]
Beginning Balance	16,698,000
Allocation of Net Income (Loss)	(448,000)
Contribution	950,000
Ending Balance	17,200,000	16,698,000
MWN, LLC – related party
Equity Method Investments [Roll Forward]
Beginning Balance	165,000
Allocation of Net Income (Loss)	10,000
Contribution	0
Sale	(175,000)
Ending Balance	0	165,000
One MSO, LLC - related party
Equity Method Investments [Roll Forward]
Beginning Balance	0
Allocation of Net Income (Loss)	0
Additional/ Initial Investment	2,395,000
Contribution	0
Ending Balance	2,395,000	0
Tag-6 Medical Investment Group, LLC - related party
Equity Method Investments [Roll Forward]
Beginning Balance	0
Allocation of Net Income (Loss)	0
Additional/ Initial Investment	4,516,000
Contribution	0
Ending Balance	4,516,000	0
Tag-8 Medical Investment Group, LLC - related party
Equity Method Investments [Roll Forward]
Beginning Balance	0
Allocation of Net Income (Loss)	0
Additional/ Initial Investment	2,108,000
Contribution	0
Ending Balance	$ 2,108,000	$ 0