CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 71,609	$ 135,752
Marketable securities available for sale, current portion	22,008	105,826
Accounts receivable, net	142,595	104,974
Prepaid expenses and other current assets	23,113	17,929
Total current assets	259,325	364,481
Marketable securities available for sale, less current portion	5,417	4,170
Other investments	11,083	10,934
Property and equipment, net	41,080	33,017
Goodwill	757,504	664,688
Intangible assets, Net	52,299	19,498
Deferred income taxes	22,856	25,032
Other assets	9,047	7,648
Total assets	1,158,611	1,129,468
Current liabilities:
Accounts payable	18,958	11,139
Accrued compensation and employee benefits	50,043	36,470
Other accrued liabilities	43,645	47,031
Deferred revenue	47,959	41,768
Deferred income taxes		2,090
Current maturities on long-term debt	49,000	8,000
Total current liabilities	209,605	146,498
Senior notes	455,000	504,000
Other liabilities	19,600	13,476
Total liabilities	684,205	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 34,839 and 37,084 shares outstanding at September 30, 2012 and 2011, respectively)	348	371
Paid-in-capital	1,103,611	1,098,388
Treasury stock, at cost (54,018 and 51,773 shares at September 30, 2012 and 2011, respectively)	(1,718,570)	(1,627,180)
Retained earnings	1,104,825	1,015,624
Accumulated other comprehensive loss	(15,808)	(21,709)
Total stockholders' equity	474,406	465,494
Total liabilities and stockholders' equity	$ 1,158,611	$ 1,129,468