CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Current assets:
Cash and cash equivalents	$ 91,949	$ 187,307
Marketable securities	0	22,168
Accounts receivable, less allowances for doubtful accounts of $9,536 and $10,073	180,171	162,292
Prepaid expenses and other current assets	203,684	231,778
Total current assets	475,804	603,545
Land, building and equipment, net	147,704	146,660
Goodwill	2,154,658	2,155,270
Intangible assets, net	116,002	128,331
Right-of-use assets	77,905	82,666
Deferred tax assets	45,927	45,927
Other assets	218,557	224,254
Total assets	3,236,557	3,386,653
Current liabilities:
Current portion of long-term debt	348,669	372,999
Contingent and deferred acquisition payments	1,882	2,148
Accounts payable	75,326	90,120
Accrued expenses and other current liabilities	154,276	222,340
Deferred revenue	261,010	240,742
Total current liabilities	841,163	928,349
Long-term debt	495,185	494,925
Deferred revenue, net of current portion	99,505	108,317
Deferred tax liabilities	27,723	12,019
Operating lease liabilities	80,444	85,290
Other liabilities	76,915	77,781
Total liabilities	1,620,935	1,706,681
Commitments and contingencies (Note 16)
Mezzanine Equity	40,723	45,038
Stockholders’ equity:
Common stock, $0.001 par value per share; 560,000 shares authorized; 322,582 and 319,402 shares issued and 318,831 and 315,651 shares outstanding, respectively	323	319
Additional paid-in capital	2,055,139	2,054,994
Treasury stock, at cost (3,751 shares)	(16,788)	(16,788)
Accumulated other comprehensive loss	(107,274)	(104,649)
Accumulated deficit	(356,501)	(298,942)
Total stockholders’ equity	1,574,899	1,634,934
Total liabilities and stockholders’ equity	$ 3,236,557	$ 3,386,653