CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net (loss) income	$ (80,699)	$ 37,902
Adjustments to reconcile net (loss) income to net cash provided by operations:
Depreciation and amortization	18,853	22,276
Benefit from credit loss reserve	(414)	(412)
Stock-based compensation	23,020	42,179
Non-cash interest expense	3,922	3,730
Deferred tax provision (benefit)	103,394	(3,812)
Other	5,137	(1,590)
Changes in operating assets and liabilities:
Accounts receivable	(21,626)	(1,698)
Prepaid expenses and other assets	(34,621)	(17,065)
Deferred costs	3,753	5,078
Accounts payable	4,638	2,906
Accrued expenses and other liabilities	(2,698)	(4,026)
Deferred revenue	(19,844)	(34,400)
Net cash provided by operating activities	2,815	51,068
Cash flows from investing activities:
Capital expenditures	(14,418)	(8,055)
Purchases of marketable securities	(21,153)	(33,800)
Sale and maturities of marketable securities	31,003	9,000
Payments for equity investments	(584)	(2,563)
Other investing activities	1,735	702
Net cash used in investing activities	(3,417)	(34,716)
Cash flows from financing activities:
Payments for long-term debt issuance costs		(520)
Principal payments of long-term debt	(4,689)	(4,689)
Common stock repurchases for tax withholdings for net settlement of equity awards	(47,960)	(34,089)
Principal payment of lease liabilities arising from a finance lease	(289)	(326)
Proceeds from the issuance of common stock	34,943	6,682
Net cash used in financing activities	(17,995)	(32,942)
Effects of exchange rate changes on cash and cash equivalents	(1,377)	1,363
Net change in cash and cash equivalents	(19,974)	(15,227)
Cash and cash equivalents at beginning of period	128,428	136,067
Cash and cash equivalents at end of period	108,454	120,840
Supplemental information:
Cash paid for income taxes	9,868	1,946
Cash paid for interest	$ 7,724	$ 8,817