CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Net revenue:
Managed care and other	$ 752,151		$ 716,998		$ 1,479,791		$ 1,403,057
Dispensing	90,597		88,475		184,718		175,629
Total net revenue	842,748		805,473		1,664,509		1,578,686
Cost and expenses:
Cost of care	542,826		521,830		1,072,757		1,027,123
Cost of goods sold	84,979		82,855		173,587		163,893
Direct service costs and other operating expenses	144,497	[1]	140,333	[1]	284,124	[1]	276,922	[1]
Depreciation and amortization	16,946		15,152		33,116		29,933
Interest expense	792		576		1,402		1,176
Interest income	(358)		(857)		(711)		(1,269)
Total cost and expenses	789,682		759,889		1,564,275		1,497,778
Income before income taxes	53,066		45,584		100,234		80,908
Provision for income taxes	21,586		18,611		40,696		33,145
Net income	31,480		26,973		59,538		47,763
Net income per common share -basic (See Note B) (in dollars per share)	$ 1.17		$ 0.99		$ 2.21		$ 1.75
Net income per common share-diluted (See Note B) (in dollars per share)	$ 1.15		$ 0.97		$ 2.17		$ 1.72
Other comprehensive (loss) income:
Unrealized (losses) gains on available-for-sale securities	(70)	[2]	(85)	[2]	(147)	[2]	88	[2]
Comprehensive income	$ 31,410		$ 26,888		$ 59,391		$ 47,851

[1] Includes stock compensation expense of $4,365 and $4,602 for the three months ended June 30, 2012 and 2013, respectively, and $9,467 and $10,240 for the six months ended June 30, 2012 and 2013, respectively.

[2] Net of income tax provision (benefit) of $(55) and $(47) for the three months ended June 30, 2012 and 2013, respectively, and $56 and $(99) for the six months ended June 30, 2012 and 2013, respectively.