CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Total revenues	$ 1,990,869	$ 1,717,526	$ 1,513,557
Operating expenses:
Cost of revenues	353,722	348,206	311,053
Research and development	188,347	171,940	159,950
Selling, general and administrative	513,028	462,834	400,565
Amortization of intangible assets	0	917	1,100
Restructuring charges	10,922	0	0
Gain on product line asset sale	0	0	(1,941)
Total operating expenses	1,066,019	983,897	870,727
Operating income	924,850	733,629	642,830
Interest expense, net	(133,647)	(105,638)	(95,546)
Other income, net	11,392	14,034	6,340
Income before income taxes	802,595	642,025	553,624
Provision for income taxes	150,649	129,214	124,249
Net income	651,946	512,811	429,375
Other comprehensive income (loss):
Foreign currency translation adjustments	(421)	10,516	22,557
Comprehensive income	$ 651,525	$ 523,327	$ 451,932
Earnings per share:
Basic (in dollars per share)	$ 26.90	$ 20.78	$ 17.18
Diluted (in dollars per share)	$ 26.54	$ 20.45	$ 16.93
Shares used in computing basic earnings per share:
Basic (in shares)	24,239	24,676	24,986
Diluted (in shares)	24,561	25,079	25,367
On-premises and SaaS software
Total revenues	$ 740,145	$ 711,340	$ 640,182
Professional services
Total revenues	82,149	86,536	99,547
Scores
Total revenues	$ 1,168,575	$ 919,650	$ 773,828