Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net earnings	$ 289,675	$ 149,716
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	86,842	89,301
Net (gain) loss on sales of assets and businesses	(565)	672
Stock-based compensation	27,926	19,369
Deferred income taxes	44	545
Changes in operating assets and liabilities:
Trade accounts receivable	45,454	(69,628)
Unbilled receivables (contract assets)	(54,274)	(49,890)
Costs to fulfill a contract	(898)	(9,279)
Inventories	(95,275)	(7,443)
Accounts payable and accrued liabilities	19,508	23,303
Contract liabilities	21,337	15,229
Income taxes	(38,520)	(29,635)
Retirement benefit obligations	(1,486)	(779)
Other	(2,439)	24,149
Net cash provided by operating activities	297,329	155,630
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(72,193)	(57,142)
Proceeds from sale of assets	84	477
Proceeds from business divestiture	900
Business acquisition, net of cash acquired	0	878
Payments for short-term investments	(6,767)	(6,109)
Proceeds from sales of short-term investments	9,737	7,692
Net cash (used in) investing activities	(68,239)	(54,204)
Cash flows from financing activities:
Cash dividends paid	(43,457)	(37,762)
Proceeds from sales of treasury stock	90,142	26,888
Payments for repurchases of common stock	(304,811)	(26,369)
Borrowings on revolving lines of credit and short-term borrowings	2,258,600	1,538,900
Payments on revolving lines of credit and short-term borrowings	(1,983,800)	(1,582,200)
Payments of debt financing costs	0	(2,236)
Payments of long-term debt and finance lease obligations	(75,644)	(536)
Net cash (used in) financing activities	(58,970)	(83,315)
Effect of exchange rate changes on cash and cash equivalents	765	(11,848)
Net change in cash and cash equivalents	170,885	6,263
Cash and cash equivalents at beginning of year	137,447	107,844
Cash and cash equivalents at end of period	$ 308,332	$ 114,107