CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income	$ 152,528	$ 121,065
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,535	2,824
Share-based compensation	40,654	31,574
Deferred income taxes	(5,947)	(4,435)
Net (gain) loss on marketable securities	1,135	(2,884)
Non-cash operating lease costs	2,840	3,500
Provision for doubtful accounts	495	419
Net (gain) loss on sales and abandonment of property and equipment	(8)	400
Changes in operating assets and liabilities:
Accounts receivable	57,370	27,399
Prepaid expenses and other assets	(19,768)	(13,457)
Accounts payable	841	(642)
Accrued compensation and employee benefits	(27,125)	(35,141)
Other liabilities	(26,238)	(16,490)
Deferred revenue	13,685	7,988
Net cash provided by operating activities	193,997	122,120
Cash flows from investing activities:
Purchases of property and equipment	(841)	(1,361)
Payments to Develop Software	(6,330)	0
Proceeds from sales of marketable securities	375	13,167
Purchases of marketable securities	(2,146)	(14,224)
Net cash used in investing activities	(8,942)	(2,418)
Cash flows from financing activities:
Proceeds from revolving line of credit and term loans	275,000	170,000
Payments on revolving line of credit and term loans	(63,750)	(70,750)
Payments on finance leases	22	0
Proceeds from issuance of treasury stock under employee stock plans	3,261	4,499
Taxes paid related to net share settlement of equity awards	(196,126)	(131,911)
Repurchases of common stock	(162,581)	(71,704)
Net cash used in financing activities	(144,218)	(99,866)
Effect of exchange rate changes on cash	(7,250)	3,807
Increase in cash and cash equivalents	33,587	23,643
Cash and cash equivalents, beginning of period	150,667	136,778
Cash and cash equivalents, end of period	184,254	160,421
Supplemental disclosures of cash flow information:
Cash paid for income taxes, net of refunds of $236 and $10 during the quarters ended December 31, 2024 and 2023, respectively	21,778	4,926
Cash paid for interest	43,714	38,236
Supplemental disclosures of non-cash investing and financing activities:
Purchase of property and equipment included in accounts payable	229	178
Unsettled repurchases of common stock	$ 10,559	$ 0