CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Current assets:
Cash and cash equivalents	$ 474,776	$ 315,963
Marketable securities	145,908	135,579
Accounts receivable, less allowances for doubtful accounts of $9,971 and $9,823	292,567	347,873
Prepaid expenses and other current assets	171,717	94,814
Disposal Group, Including Discontinued Operation, Assets, Current	0	34,402
Total current assets	1,084,968	928,631
Marketable Securities, Noncurrent	12,414	21,932
Land, building and equipment, net	142,968	153,452
Goodwill	3,238,410	3,247,105
Intangible assets, net	398,312	450,001
Other assets	255,928	141,761
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	359,497
Total assets	5,133,000	5,302,379
Current liabilities:
Contingent And Deferred Acquisition Payments	12,249	14,211
Accounts payable	83,295	80,912
Accrued expenses and other current liabilities	211,471	269,339
Deferred revenue	300,746	330,689
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	69,013
Total current liabilities	607,761	764,164
Long-term debt	1,911,185	2,185,361
Deferred revenue, net of current portion	414,437	434,316
Deferred tax liabilities	51,656	49,931
Other liabilities	103,214	93,593
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	57,518
Total liabilities	3,088,253	3,584,883
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value per share; 560,000 shares authorized; 290,038 and 291,504 shares issued and 286,287 and 287,753 shares outstanding, respectively	290	291
Additional paid-in capital	2,592,708	2,597,693
Treasury stock, at cost (3,751 shares)	(16,788)	(16,788)
Accumulated other comprehensive loss	(120,463)	(122,863)
Accumulated deficit	(411,000)	(740,837)
Total stockholders’ equity	2,044,747	1,717,496
Total liabilities and stockholders’ equity	$ 5,133,000	$ 5,302,379