CONSOLIDATED STATEMENTS OF INCOME (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
Net revenue	$ 698,338		$ 741,658		$ 1,391,093		$ 1,469,711
Cost and expenses:
Cost of care	441,446		472,478		875,146		949,157
Cost of goods sold	53,404		54,771		109,923		111,067
Direct service costs and other operating expenses	131,779	[1]	139,617	[1]	263,346	[1]	277,871	[1]
Depreciation and amortization	14,267		14,235		28,219		27,657
Interest expense	494		584		965		1,269
Interest income	(858)		(803)		(1,673)		(1,620)
Total cost and expenses	640,532		680,882		1,275,926		1,365,401
Income before income taxes	57,806		60,776		115,167		104,310
Provision for income taxes	23,575		25,348		46,638		43,363
Net income	34,231		35,428		68,529		60,947
Other comprehensive (loss) income	(19)		(285)		78		(259)
Comprehensive income	$ 34,212		$ 35,143		$ 68,607		$ 60,688
Weighted average number of common shares outstanding-basic (See Note B) (in shares)	31,301		33,323		32,171		33,849
Weighted average number of common shares outstanding-diluted (See Note B) (in shares)	31,903		33,800		32,775		34,434
Net income per common share-basic: (in dollars per share)	$ 1.09		$ 1.06		$ 2.13		$ 1.80
Net income per common share-diluted: (in dollars per share)	$ 1.07		$ 1.05		$ 2.09		$ 1.77

[1] Includes stock compensation expense of $3,706 and $4,205 for the three months ended June 30, 2010 and 2011, respectively, and $8,234 and $8,983 for the six months ended June 30, 2010 and 2011, respectively.