CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Current assets:
Cash and cash equivalents	$ 293,251	$ 315,963
Marketable securities	137,896	135,579
Accounts receivable, less allowances for doubtful accounts of $12,319 and $11,724	337,829	347,873
Prepaid expenses and other current assets	197,414	94,814
Disposal Group, Including Discontinued Operation, Assets, Current	395,266	34,402
Total current assets	1,361,656	928,631
Marketable Securities, Noncurrent	18,446	21,932
Land, building and equipment, net	147,319	153,452
Goodwill	3,238,338	3,247,105
Intangible assets, net	424,032	450,001
Other assets	260,228	141,761
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	359,497
Total assets	5,450,019	5,302,379
Current liabilities:
Contingent And Deferred Acquisition Payments	16,043	14,211
Accounts payable (including $0 and $416 due to a related party, as more fully described in Note 18)	90,006	80,912
Accrued expenses and other current liabilities	188,411	269,339
Deferred revenue	287,242	330,689
Disposal Group, Including Discontinued Operation, Liabilities, Current	116,978	69,013
Total current liabilities	698,680	764,164
Long-term debt	2,197,734	2,185,361
Deferred revenue, net of current portion	441,283	434,316
Deferred tax liabilities	66,386	49,931
Other liabilities	103,797	93,593
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	57,518
Total liabilities	3,507,880	3,584,883
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value per share; 560,000 shares authorized; XXX,XXX and 291,504 shares issued and XXX,XXX and 287,753 shares outstanding, respectively	290	291
Additional paid-in capital	2,578,496	2,597,693
Treasury stock, at cost (3,751 shares)	(16,788)	(16,788)
Accumulated other comprehensive loss	(131,527)	(122,863)
Accumulated deficit	(488,332)	(740,837)
Total stockholders’ equity	1,942,139	1,717,496
Total liabilities and stockholders’ equity	$ 5,450,019	$ 5,302,379