CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 90,839	$ 71,609
Marketable securities available for sale, current portion		22,008
Accounts receivable, net	138,159	142,595
Prepaid expenses and other current assets	22,376	23,113
Total current assets	251,374	259,325
Marketable securities available for sale, less current portion	5,496	5,417
Other investments	11,033	11,083
Property and equipment, net	45,788	41,080
Goodwill	769,959	757,504
Intangible assets, net	65,304	52,299
Deferred income taxes	18,158	22,856
Other assets	9,002	9,047
Total assets	1,176,114	1,158,611
Current liabilities:
Accounts payable	21,509	18,958
Accrued compensation and employee benefits	30,170	50,043
Other accrued liabilities	40,869	43,645
Deferred revenue	47,455	47,959
Current maturities on long-term debt	49,000	49,000
Total current liabilities	189,003	209,605
Senior notes	455,000	455,000
Other liabilities	23,383	19,600
Total liabilities	667,386	684,205
Commitments and contingencies
Stockholders' equity:
Preferred stock ($0.01 par value; 1,000 shares authorized; none issued and outstanding)
Common stock ($0.01 par value; 200,000 shares authorized, 88,857 shares issued and 35,478 and 34,839 shares outstanding at December 31, 2012 and September 30, 2012, respectively)	355	348
Paid-in-capital	1,096,278	1,103,611
Treasury stock, at cost (53,379 and 54,018 shares at December 31, 2012 and September 30, 2012, respectively)	(1,698,250)	(1,718,570)
Retained earnings	1,127,544	1,104,825
Accumulated other comprehensive loss	(17,199)	(15,808)
Total stockholders' equity	508,728	474,406
Total liabilities and stockholders' equity	$ 1,176,114	$ 1,158,611