Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
ASSETS
Cash and cash equivalents	$ 277,935	$ 273,417
Short term marketable securities	18,695	0
Accounts receivable, net of allowance for doubtful accounts of $1,012 and $998 at September 30, 2016 and 2015, respectively	161,357	197,275
Prepaid expenses	52,819	56,365
Other current assets	131,783	140,819
Deferred tax assets	0	36,803
Total current assets	642,589	704,679
Property and equipment, net	67,113	65,162
Goodwill	1,169,813	1,069,041
Acquired intangible assets, net	310,305	291,301
Long term marketable securities	30,921	0
Deferred tax assets	89,692	38,936
Other assets	41,820	40,794
Total assets	2,352,253	2,209,913
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	18,022	13,361
Accrued expenses and other current liabilities	84,141	97,613
Accrued compensation and benefits	145,633	82,414
Accrued income taxes	6,303	4,010
Deferred tax liabilities	0	1,622
Current portion of long term debt	0	50,000
Deferred revenue	400,420	368,240
Total current liabilities	654,519	617,260
Long term debt, net of current portion	758,125	618,125
Deferred tax liabilities	13,754	42,361
Deferred revenue	13,237	18,610
Other liabilities	69,952	53,386
Total liabilities	1,509,587	1,349,742
Commitments and contingencies (Note I)
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; 114,968 and 113,745 shares issued and outstanding at September 30, 2016 and 2015, respectively	1,150	1,137
Additional paid-in capital	1,598,548	1,553,390
Accumulated deficit	(657,079)	(602,614)
Accumulated other comprehensive loss	(99,953)	(91,742)
Total stockholders' equity	842,666	860,171
Total liabilities and stockholders' equity	$ 2,352,253	$ 2,209,913