Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
ASSETS
Cash and cash equivalents	$ 275,458	$ 269,579
Short-term marketable securities	28,129	27,891
Accounts receivable, net of allowance for doubtful accounts of $543 and $744 at September 30, 2020 and 2019, respectively	415,221	372,743
Prepaid expenses	69,408	52,701
Other current assets	45,231	59,707
Total current assets	833,447	782,621
Property and equipment, net	101,499	105,531
Goodwill	1,625,786	1,238,179
Acquired intangible assets, net	237,570	169,949
Long-term marketable securities	30,970	29,544
Deferred tax assets	190,963	198,634
Operating right-of-use lease assets	149,933	0
Other assets	212,570	140,130
Total assets	3,382,738	2,664,588
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	24,910	42,442
Accrued expenses and other current liabilities	96,313	104,028
Accrued compensation and benefits	101,087	88,769
Accrued income taxes	7,011	17,407
Deferred revenue	416,804	385,509
Short-term lease obligations	34,635	0
Total current liabilities	680,760	638,155
Long-term debt	1,005,314	669,134
Deferred tax liabilities	12,431	41,683
Deferred revenue	9,661	11,123
Long-term lease obligations	180,388	0
Other liabilities	55,936	102,495
Total liabilities	1,944,490	1,462,590
Commitments and contingencies (Note 10)	0	0
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; 116,125 and 114,899 shares issued and outstanding at September 30, 2020 and 2019, respectively	1,161	1,149
Additional paid-in capital	1,602,728	1,502,949
Accumulated deficit	(62,267)	(191,390)
Accumulated other comprehensive loss	(103,374)	(110,710)
Total stockholders’ equity	1,438,248	1,201,998
Total liabilities and stockholders’ equity	$ 3,382,738	$ 2,664,588