Investments in Other Entities — Equity Method - Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity Method Investments [Roll Forward]
Beginning Balance			$ 43,292
Allocation of Income (Loss)	$ (3,134)	$ 834	(3,812)	$ 2,888
Contribution			1,660
Entity Consolidated			(3,768)
Ending Balance	37,372		37,372
LaSalle Medical Associates – IPA Line of Business
Equity Method Investments [Roll Forward]
Beginning Balance			13,047
Allocation of Income (Loss)			(4,328)
Contribution			0
Entity Consolidated			0
Ending Balance	8,719		8,719
Pacific Medical Imaging & Oncology Center, Inc.
Equity Method Investments [Roll Forward]
Beginning Balance			1,413
Allocation of Income (Loss)			(30)
Contribution			0
Entity Consolidated			0
Ending Balance	1,383		1,383
Diagnostic Medical Group
Equity Method Investments [Roll Forward]
Beginning Balance			2,613
Allocation of Income (Loss)			220
Contribution			0
Entity Consolidated			0
Ending Balance	2,833		2,833
531 W. College, LLC – related party
Equity Method Investments [Roll Forward]
Beginning Balance			17,200
Allocation of Income (Loss)			(115)
Contribution			0
Entity Consolidated			0
Ending Balance	17,085		17,085
One MSO, LLC - related party
Equity Method Investments [Roll Forward]
Beginning Balance			2,395
Allocation of Income (Loss)	100		246
Ending Balance	2,641		2,641
Tag-6 Medical Investment Group, LLC - related party
Equity Method Investments [Roll Forward]
Beginning Balance			4,516
Allocation of Income (Loss)			195
Contribution			0
Entity Consolidated			0
Ending Balance	4,711		4,711
Tag-8 Medical Investment Group, LLC - related party
Equity Method Investments [Roll Forward]
Beginning Balance			2,108
Allocation of Income (Loss)			0
Contribution			1,660
Entity Consolidated			(3,768)
Ending Balance	$ 0		$ 0