Investments in Other Entities - Equity Method - Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Equity Method Investments [Roll Forward]
Beginning Balance	$ 28,427
Allocation of Income (Loss)	2,054	$ (850)
Contribution	300
Ending Balance	30,781
LaSalle Medical Associates – IPA Line of Business
Equity Method Investments [Roll Forward]
Beginning Balance	6,397
Allocation of Income (Loss)	(643)
Contribution	0
Ending Balance	5,754
Pacific Medical Imaging & Oncology Center, Inc.
Equity Method Investments [Roll Forward]
Beginning Balance	1,396
Allocation of Income (Loss)	87
Contribution	0
Ending Balance	1,483
Universal Care, Inc.
Equity Method Investments [Roll Forward]
Beginning Balance	1,438
Allocation of Income (Loss)	2,670	$ 1,000
Contribution	0
Ending Balance	4,108
Diagnostic Medical Group
Equity Method Investments [Roll Forward]
Beginning Balance	2,334
Allocation of Income (Loss)	(5)
Contribution	0
Ending Balance	2,329
531 W. College, LLC – related party
Equity Method Investments [Roll Forward]
Beginning Balance	16,698
Allocation of Income (Loss)	(111)
Contribution	300
Ending Balance	16,887
MWN, LLC – related party
Equity Method Investments [Roll Forward]
Beginning Balance	164
Allocation of Income (Loss)	56
Contribution	0
Ending Balance	$ 220