CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Sep. 30, 2018
Current assets:
Cash and cash equivalents	$ 536,377	$ 315,963
Marketable securities	136,986	135,579
Accounts receivable, less allowances for doubtful accounts of $10,538 and $9,823	313,599	347,873
Prepaid expenses and other current assets	193,795	94,814
Disposal Group, Including Discontinued Operation, Assets, Current	0	34,402
Total current assets	1,180,757	928,631
Marketable Securities, Noncurrent	12,796	21,932
Land, building and equipment, net	138,466	153,452
Goodwill	3,242,693	3,247,105
Intangible assets, net	372,934	450,001
Other assets	241,271	141,761
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	359,497
Total assets	5,188,917	5,302,379
Current liabilities:
Contingent And Deferred Acquisition Payments	17,122	14,211
Accounts payable	95,272	80,912
Accrued expenses and other current liabilities	245,012	269,339
Deferred revenue	310,586	330,689
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	69,013
Total current liabilities	667,992	764,164
Long-term debt	1,923,716	2,185,361
Deferred revenue, net of current portion	410,897	434,316
Deferred tax liabilities	45,456	49,931
Other liabilities	97,858	93,593
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	57,518
Total liabilities	3,145,919	3,584,883
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value per share; 560,000 shares authorized; 288,730 and 291,504 shares issued and 284,979 and 287,753 shares outstanding, respectively	289	291
Additional paid-in capital	2,578,050	2,597,693
Treasury stock, at cost (3,751 shares)	(16,788)	(16,788)
Accumulated other comprehensive loss	(116,812)	(122,863)
Accumulated deficit	(401,741)	(740,837)
Total stockholders’ equity	2,042,998	1,717,496
Total liabilities and stockholders’ equity	$ 5,188,917	$ 5,302,379