Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 69,767	$ 81,705
Restricted cash and cash equivalents	7,020	10,298
Marketable securities	132,535	105,009
Restricted marketable securities	19,805	14,027
Accounts receivable, less allowance for doubtful accounts of $5,738 and $4,972, respectively	78,843	79,856
Inventories	7,127	7,146
Prepaid expenses and other assets	2,260	1,208
Notes receivable, current portion	441	417
Federal income tax receivable	4,727
Total current assets	322,525	299,666
Property and Equipment:
Property and equipment, at cost	821,792	734,682
Accumulated depreciation and amortization	(307,048)	(277,884)
Net property and equipment	514,744	456,798
Other Assets:
Restricted cash and cash equivalents	3,631	3,631
Restricted marketable securities	138,468	127,976
Deposits and other assets	8,791	6,808
Goodwill	17,600	17,600
Notes receivable, less current portion	12,548	14,961
Deferred income taxes	18,700	18,164
Investments in limited liability companies	37,116	38,754
Total other assets	236,854	227,894
Total assets	1,074,123	984,358
Current Liabilities:
Trade accounts payable	15,877	13,050
Capital lease obligations, current portion	3,088
Accrued payroll	59,859	63,462
Amounts due to third party payors	22,931	21,619
Accrued risk reserves, current portion	26,825	24,325
Deferred income taxes	35,506	24,790
Other current liabilities	12,472	13,784
Dividends payable	7,000	6,730
Total current liabilities	183,558	167,760
Long-term debt	10,000	10,000
Capital lease obligations, less current portion	33,508
Accrued risk reserves, less current portion	79,393	86,232
Refundable entrance fees	10,219	10,720
Obligation to provide future services	3,927	3,689
Other noncurrent liabilities	16,011	14,525
Deferred revenue	3,359	3,320
Stockholders' Equity:
Series A convertible preferred stock; $.01 par value; 25,000,000 shares authorized; 10,836,659 and 10,837,665 shares, respectively, issued and outstanding; stated at liquidation value of $15.75 per share	170,494	170,510
Common stock, $.01 par value; 30,000,000 shares authorized; 14,110,859 and 14,078,028 shares, respectively, issued and outstanding	140	140
Capital in excess of par value	154,965	153,061
Retained earnings	343,941	318,216
Accumulated other comprehensive income	64,608	46,185
Total stockholders’ equity	734,148	688,112
Total liabilities and stockholders’ equity	$ 1,074,123	$ 984,358