Consolidated Statements of Net Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements of Net Income [Abstract]
Net patient revenues	$ 56,678	$ 52,296	$ 110,550	$ 101,075
Other revenues	3,234	1,807	6,103	3,433
Net revenues	59,912	54,103	116,653	104,508
Clinic operating costs:
Salaries and related costs	31,120	27,644	60,759	54,415
Rent, clinic supplies, contract labor and other	11,388	10,238	22,683	20,338
Provision for doubtful accounts	504	734	1,128	1,768
Closure costs	11	(14)	31	15
Total clinic operating costs	43,023	38,602	84,601	76,536
Corporate office costs	6,007	5,511	12,488	11,316
Operating income	10,882	9,990	19,564	16,656
Interest and other income, net	2	2	4	582
Interest expense	(109)	(81)	(182)	(145)
Income before taxes	10,775	9,911	19,386	17,093
Provision for income taxes	3,172	2,877	5,598	4,928
Net income including noncontrolling interests	7,603	7,034	13,788	12,165
Less: net income attributable to noncontrolling interests	(2,703)	(2,583)	(5,142)	(4,542)
Net income attributable to common shareholders	$ 4,900	$ 4,451	$ 8,646	$ 7,623
Earnings per share attributable to common shareholders:
Basic	$ 0.42	$ 0.38	$ 0.73	$ 0.66
Diluted	$ 0.41	$ 0.38	$ 0.72	$ 0.64
Shares used in computation:
Basic	11,807	11,622	11,767	11,618
Diluted	11,999	11,857	11,978	11,849
Dividends declared per common share	$ 0.08		$ 0.16