CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 146,036	$ 135,752
Marketable securities available for sale, current portion	45,049	105,826
Accounts receivable, net	107,436	104,974
Prepaid expenses and other current assets	16,777	17,929
Total current assets	315,298	364,481
Marketable securities available for sale, less current portion	5,036	4,170
Other investments	11,133	10,934
Property and equipment, net	35,138	33,017
Goodwill	667,098	664,688
Intangible assets, net	16,120	19,498
Deferred income taxes	23,054	25,032
Other assets	7,714	7,648
Total assets	1,080,591	1,129,468
Current liabilities:
Accounts payable	11,198	11,139
Accrued compensation and employee benefits	34,356	36,470
Other accrued liabilities	37,203	47,031
Deferred revenue	51,030	41,768
Deferred income taxes	458	2,090
Current maturities on long-term debt	8,000	8,000
Total current liabilities	142,245	146,498
Senior notes	504,000	504,000
Other liabilities	21,152	13,476
Total liabilities	667,397	663,974
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 34,261 and 37,084 shares outstanding at March 31, 2012 and September 30, 2011, respectively)	343	371
Paid-in-capital	1,096,403	1,098,388
Treasury stock, at cost (54,596 and 51,773 shares at March 31, 2012 and September 30, 2011, respectively)	(1,729,496)	(1,627,180)
Retained earnings	1,064,207	1,015,624
Accumulated other comprehensive loss	(18,263)	(21,709)
Total stockholders' equity	413,194	465,494
Total liabilities and stockholders' equity	$ 1,080,591	$ 1,129,468