CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue	$ 329,825	$ 387,877	$ 671,619	$ 771,048
Costs and expenses:
Cost of educational services	140,940	142,272	275,881	280,198
Student services and administrative expenses	111,467	115,626	217,733	220,209
Total costs and expenses	252,407	257,898	493,614	500,407
Operating income	77,418	129,979	178,005	270,641
Interest income	502	790	1,183	1,625
Interest (expense)	(1,254)	(507)	(1,801)	(1,064)
Income before provision for income taxes	76,666	130,262	177,387	271,202
Provision for income taxes	30,664	51,262	70,314	106,816
Net income	$ 46,002	$ 79,000	$ 107,073	$ 164,386
Earnings per share:
Basic	$ 1.97	$ 2.88	$ 4.39	$ 5.81
Diluted	$ 1.96	$ 2.85	$ 4.36	$ 5.77
Weighted average shares outstanding:
Basic	23,390	27,474	24,405	28,275
Diluted	23,529	27,719	24,583	28,511