CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Net revenue	$ 686,843		$ 750,319		$ 2,077,936		$ 2,220,030
Cost and expenses:
Cost of care	448,051		467,160		1,323,197		1,416,317
Cost of goods sold	57,636		55,071		167,559		166,138
Direct service costs and other operating expenses	130,038	[1]	141,581	[1]	393,384	[1]	419,452	[1]
Depreciation and amortization	15,069		13,950		43,288		41,607
Interest expense	457		482		1,422		1,751
Interest income	(592)		(846)		(2,265)		(2,466)
Total cost and expenses	650,659		677,398		1,926,585		2,042,799
Income before income taxes	36,184		72,921		151,351		177,231
Provision for income taxes	4,829		28,137		51,467		71,500
Net income	31,355		44,784		99,884		105,731
Other comprehensive income (loss)	(380)		280		(302)		21
Comprehensive income	$ 30,975		$ 45,064		$ 99,582		$ 105,752
Weighted average number of common shares outstanding-basic (See Note B) (in shares)	29,900		33,450		31,406		33,715
Weighted average number of common shares outstanding-diluted (See Note B) (in shares)	30,438		34,171		31,988		34,345
Net income per common share-basic: (in dollars per share)	$ 1.05		$ 1.34		$ 3.18		$ 3.14
Net income per common share-diluted: (in dollars per share)	$ 1.03		$ 1.31		$ 3.12		$ 3.08

[1] Includes stock compensation expense of $3,596 and $4,425 for the three months ended September 30, 2010 and 2011, respectively, and $11,830 and $13,408 for the nine months ended September 30, 2010 and 2011, respectively.