Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
ASSETS
Cash and cash equivalents	$ 187,351	$ 167,878
Accounts receivable, net of allowance for doubtful accounts of $3,290 and $3,902 at December 31, 2011 and September 30, 2011, respectively	221,436	230,220
Prepaid expenses	31,405	30,582
Other current assets	94,046	109,433
Deferred tax assets	54,050	54,151
Total current assets	588,288	592,264
Property and equipment, net	62,156	62,569
Goodwill	610,139	613,394
Acquired intangible assets, net	211,931	222,017
Deferred tax assets	104,183	98,064
Other assets	36,688	41,374
Total assets	1,613,385	1,629,682
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	12,638	16,974
Accrued expenses and other current liabilities	55,965	60,167
Accrued compensation and benefits	71,123	95,980
Accrued income taxes	16,548	11,895
Deferred tax liabilities	3,974	4,440
Deferred revenue	268,145	279,935
Total current liabilities	428,393	469,391
Revolving credit facility	200,000	200,000
Deferred tax liabilities	24,767	25,919
Deferred revenue	15,152	14,389
Other liabilities	97,344	97,293
Total liabilities	765,656	806,992
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.01 par value; 5,000 shares authorized; none issued	0	0
Common stock, $0.01 par value; 500,000 shares authorized; 118,620 and 116,937 shares issued and outstanding at December 31, 2011 and September 30, 2011, respectively	1,186	1,169
Additional paid-in capital	1,812,845	1,805,021
Accumulated deficit	(896,613)	(918,736)
Accumulated other comprehensive loss	(69,689)	(64,764)
Total stockholders' equity	847,729	822,690
Total liabilities and stockholders' equity	$ 1,613,385	$ 1,629,682