Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net Income (Loss)	$ 249,810	$ 199,937
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	81,272	76,943
Amortization of right-of-use lease assets	23,143	24,705
Stock-based compensation	161,242	147,568
Other non-cash items, net	(297)	(3,114)
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	131,422	99,521
Accounts payable and accrued expenses	(8,631)	5,407
Accrued compensation and benefits	8,666	5,961
Deferred revenue	8,393	18,696
Accrued income taxes	(1,795)	(9,910)
Other current assets and prepaid expenses	(9,962)	8,670
Operating lease liabilities	(13,438)	(1,360)
Other noncurrent assets and liabilities	22,045	(11,932)
Net cash provided by operating activities	651,870	561,092
Cash flows from investing activities:
Additions to property and equipment	(9,841)	(18,035)
Acquisitions of businesses, net of cash acquired	(93,457)	(828,271)
Proceeds from sale of investments	0	349
Purchases of investments	0	(5,823)
Settlement of net investment hedges	3,826	(14,204)
Divestitures of businesses and assets, net	0	(154)
Net cash used in investing activities	(99,472)	(866,138)
Cash flows from financing activities:
Borrowings under credit facility	944,845	1,130,000
Repayments of borrowings under credit facility and acquired debt	(835,796)	(744,000)
Proceeds from issuance of common stock	12,709	10,592
Payments of withholding taxes in connection with stock-based awards	(92,589)	(75,489)
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	(590,871)	307,531
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(2,003)	6,835
Net change in cash, cash equivalents, and restricted cash	(40,476)	9,320
Cash, cash equivalents, and restricted cash, beginning of period	288,798	272,888
Cash, cash equivalents, and restricted cash, end of period	248,322	282,208
Supplemental disclosure of non-cash financing and investing activities:
Withholding taxes in connection with stock-based awards, accrued	7,674	5,705
Operating right-of-use assets obtained in exchange for operating lease liabilities	$ 4,941	$ 23,142