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Organization and Summary of Accounting Policies - Medicare Accelerated Payments and Deferred Governmental Grants (Details) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Proceeds from grants received	$ 2,000,000	$ 27,000,000
Grant funds	2,400,000	37,900,000	$ 46,200,000
Unrecognized grant funds received	3,000,000	4,000,000
Repayments of grants received	60,000,000	60,000,000
Coronavirus Aid, Relief, and Economic Security Act CARES Act, Government Grants, Deferred Accelerated Payments		60,000,000
Current deferred accrued payroll and benefits	$ 0	$ 8,500,000