Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net Income (Loss)	$ 180,832	$ 138,539
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	54,144	49,037
Amortization of right-of-use lease assets	15,459	16,564
Stock-based compensation	113,204	93,750
Other non-cash items, net	649	(2,089)
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	107,507	86,478
Accounts payable and accrued expenses	(48,345)	11,110
Accrued compensation and benefits	(16,451)	(18,468)
Deferred revenue	40,971	36,092
Accrued income taxes	18,087	(12,169)
Other current assets and prepaid expenses	(21,745)	(786)
Operating lease liabilities	(10,293)	4,985
Other noncurrent assets and liabilities	4,052	(11,174)
Net cash provided by operating activities	438,071	391,869
Cash flows from investing activities:
Additions to property and equipment	(8,202)	(12,950)
Acquisitions of businesses, net of cash acquired	(93,457)	(828,271)
Purchases of investments	0	(5,823)
Settlement of net investment hedges	(2,224)	(12,544)
Divestitures of businesses and assets, net	0	(154)
Net cash used in investing activities	(103,883)	(859,742)
Cash flows from financing activities:
Borrowings under credit facility	739,845	1,130,000
Repayments of borrowings under credit facility and acquired debt	(435,671)	(564,000)
Proceeds from issuance of common stock	12,709	10,592
Payments of withholding taxes in connection with stock-based awards	(71,184)	(56,022)
Payments of principal for financing leases	0	(217)
Credit facility origination costs	0	(13,355)
Payment of deferred acquisition consideration	(620,040)	0
Net cash provided by (used in) financing activities	(374,341)	506,998
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	829	9,181
Net change in cash, cash equivalents, and restricted cash	(39,324)	48,306
Cash, cash equivalents, and restricted cash, beginning of period	288,798	272,888
Cash, cash equivalents, and restricted cash, end of period	249,474	321,194
Supplemental disclosure of non-cash financing and investing activities:
Operating right-of-use assets obtained in exchange for operating lease liabilities	$ 2,847	$ 23,596