Interim Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows From Operating Activities:
Net income	$ 123,092,000	$ 14,574,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,521,000	31,531,000
Equity in earnings of unconsolidated investments	(5,320,000)	(8,448,000)
Distributions from unconsolidated investments	6,314,000	10,050,000
Unrealized losses on marketable equity securities	23,227,000	40,580,000
Gains on sales of marketable securities	(941,000)	(135,000)
Gains on acquisitions of equity method investments	(95,202,000)	(1,708,000)
Deferred income taxes	5,428,000	10,404,000
Stock–based compensation	1,905,000	1,807,000
Changes in operating assets and liabilities:
Accounts receivable	1,195,000	9,604,000
Inventories	85,000	344,000
Prepaid expenses and other assets	(1,685,000)	2,992,000
Trade accounts payable	8,329,000	207,000
Accrued payroll	(3,480,000)	5,309,000
Amounts due to third party payors	100,000	388,000
Accrued risk reserves	4,287,000	9,977,000
Provider relief funds	(16,068,000)	21,404,000
Contract liabilities	(24,240,000)	51,253,000
Other current liabilities	2,110,000	7,985,000
Other noncurrent liabilities	(1,930,000)	(3,410,000)
Net cash provided by operating activities	46,871,000	183,900,000
Cash Flows From Investing Activities:
Purchases of property and equipment	(25,774,000)	(17,717,000)
Acquisitions of equity method investments, net of cash acquired	(28,713,000)	(6,648,000)
Investments in unconsolidated companies	(350,000)	(305,000)
Investments in notes receivable	0	(425,000)
Collections of notes receivable	8,620,000	1,572,000
Purchases of marketable securities	(95,749,000)	(19,754,000)
Proceeds from sale of marketable securities	89,129,000	28,004,000
Net cash used in investing activities	(52,837,000)	(15,273,000)
Cash Flows From Financing Activities:
Borrowings under credit facility	0	40,000,000
Repayments under credit facility	0	(50,000,000)
Principal payments under finance lease obligations	(3,292,000)	(3,101,000)
Dividends paid to common stockholders	(24,010,000)	(23,935,000)
Noncontrolling interest contributions	0	2,488,000
Issuance of common shares	2,405,000	1,075,000
Repurchase of common shares	(278,000)	(53,000)
Entrance fee (refunds) deposits	(594,000)	7,000
Net cash used in financing activities	(25,769,000)	(33,519,000)
Net (Decrease)/Increase in Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	(31,735,000)	135,108,000
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning of Period	158,502,000	61,010,000
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, End of Period	126,767,000	196,118,000
Balance Sheet Classifications:
Cash and cash equivalents	112,462,000	183,765,000
Restricted Cash and Cash Equivalents	14,305,000	12,353,000
Total Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 126,767,000	$ 196,118,000