CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Current assets:
Cash and cash equivalents	$ 111,819	$ 128,428
Marketable securities	29,810	30,435
Accounts receivable, net of allowances of $178 and $395	48,029	45,560
Deferred costs	7,418	6,095
Prepaid expenses and other current assets	68,924	76,530
Total current assets	266,000	287,048
Long-term marketable securities	4,457	7,339
Property and equipment, net	37,184	31,505
Deferred costs	26,511	31,702
Operating lease right of use assets	18,654	14,901
Goodwill	1,123,561	1,128,511
Intangible assets, net	15,947	25,348
Deferred tax assets	155,763	159,293
Other assets	54,450	20,081
Total assets	1,702,527	1,705,728
Current liabilities:
Accounts payable	18,165	11,636
Deferred revenue	78,895	78,394
Short-term operating lease liabilities	5,844	4,562
Short-term debt	7,813	6,250
Accrued expenses and other current liabilities	45,768	64,467
Total current liabilities	156,485	165,309
Long-term debt	263,000	265,093
Deferred revenue, net of current portion	182,823	198,343
Long-term operating lease liabilities	14,749	12,216
Other liabilities	29,284	32,822
Total liabilities	646,341	673,783
Commitments and contingencies (Note 12)
Stockholders' Equity:
Common stock, $0.01 par value, 560,000 shares authorized; 39,305 and 38,025 shares issued and outstanding, respectively	393	381
Accumulated other comprehensive (loss) income	(9,083)	1,634
Additional paid-in capital	1,018,731	1,002,353
Retained earnings	46,145	27,577
Total stockholders' equity	1,056,186	1,031,945
Total liabilities and stockholders' equity	$ 1,702,527	$ 1,705,728