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Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2025

Accounting Policies [Abstract]

Schedule of Inventories

Inventories consist of the following (in thousands):

						September 30,
						2025						2024
Finished goods						$	26,933					$	27,922
Raw materials						50,296						48,456
						$	77,229					$	76,378

Property, Plant and Equipment

Property and equipment consist of the following (in thousands):

						September 30,
						2025						2024
Computer equipment						$	228,514					$	206,861
Software						70,808						71,690
Office furniture and equipment						46,903						44,776
Leasehold improvements						190,637						186,179
						536,862						509,506
Accumulated depreciation and amortization						(379,915)						(358,563)
						$	156,947					$	150,943

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):

						Years Ended September 30,
						2025						2024						2023
Numerator
Net income						$	692,380					$	566,778					$	394,948
Denominator
Weighted average shares outstanding — basic						57,904						58,720						59,909
Dilutive effect of common shares from stock options and restricted stock units						780						639						361
Weighted average shares outstanding — diluted						58,684						59,359						60,270
Basic net income per share						$	11.96					$	9.65					$	6.59
Diluted net income per share						$	11.80					$	9.55					$	6.55

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Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

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Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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