Interim Condensed Consolidated Statements of Cash Flows (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows From Operating Activities:
Net income	$ 13,805,000	$ 12,654,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,956,000	7,380,000
Provision for doubtful accounts receivable	806,000	501,000
Equity in earnings of unconsolidated investments	(3,806,000)	(2,804,000)
Distributions from unconsolidated investments	2,022,000	16,000
Gains on sale of marketable securities	(230,000)	(687,000)
Deferred income taxes	(1,171,000)	(618,000)
Stock–based compensation	498,000	543,000
Changes in operating assets and liabilities:
Restricted cash and cash equivalents	(5,125,000)	(2,836,000)
Accounts receivable	(1,800,000)	(3,037,000)
Income tax receivable	5,933,000	3,779,000
Inventories	102,000	481,000
Prepaid expenses and other assets	(1,785,000)	(1,724,000)
Trade accounts payable	393,000	384,000
Accrued payroll	(1,858,000)	(16,243,000)
Amounts due to third party payors	(175,000)	471,000
Other current liabilities and accrued risk reserves	6,807,000	2,370,000
Other noncurrent liabilities	572,000	(140,000)
Deferred revenue	2,904,000	3,056,000
Net cash provided by operating activities	24,848,000	3,546,000
Cash Flows From Investing Activities:
Additions to property and equipment	(6,366,000)	(2,972,000)
Collections of notes receivable, net	394,000	170,000
Change in restricted cash and cash equivalents	(688,000)	237,000
Purchase of marketable securities	(22,193,000)	(24,343,000)
Sale of marketable securities	22,055,000	23,394,000
Net cash used in investing activities	(6,798,000)	(3,514,000)
Cash Flows From Financing Activities:
Tax benefit from stock–based compensation		3,000
Dividends paid to preferred stockholders	(2,168,000)	(2,168,000)
Dividends paid to common stockholders	(4,236,000)	(4,146,000)
Issuance of common shares		5,578,000
Repurchase of common shares	(4,700,000)
Entrance fee deposits (refunds)	157,000	(511,000)
Change in deposits	35,000	(82,000)
Net cash used in financing activities	(10,912,000)	(1,326,000)
Net Increase (Decrease) in Cash and Cash Equivalents	7,138,000	(1,294,000)
Cash and Cash Equivalents, Beginning of Period	66,701,000	61,008,000
Cash and Cash Equivalents, End of Period	$ 73,839,000	$ 59,714,000