Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net earnings	$ 171,698	$ 208,649	$ 240,395
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	120,628	129,524	131,158
Impairment of assets sold			37,902
Net (gain) on sales of assets and businesses	(1,775)	(4,452)	(23,598)
Gain on cross-currency interest rate swaps, net			(30,481)
Stock-based compensation	20,109	21,475	22,902
Deferred income taxes	(23,226)	(11,964)	1,311
Changes in operating assets and liabilities:
Trade accounts receivable	(54,380)	41,241	52,095
Unbilled receivables (contract assets)	(44,451)	(16,491)	(22,028)
Costs to fulfill a contract	(17,118)	(19,761)	(27,446)
Inventories	(110,196)	18,871	61,019
Accounts payable and accrued liabilities	122,963	61,793	(153,318)
Contract liabilities	12,466	24,848	25,882
Income taxes	29,644	21,509	(37,099)
Retirement benefit obligations	(4,424)	(6,848)	(3,777)
Other	(28,300)	(3,725)	74,574
Net cash provided by operating activities	193,638	464,669	349,491
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(52,868)	(37,689)	(47,087)
Proceeds from sale of assets	43	154	30,173
Payments for business acquisition, net of cash acquired	(21,549)
Proceeds from business divestiture	6,000		10,443
Proceeds from sales of short-term investments	12,557	16,575	12,700
Payments for purchases of short-term investments	(9,632)	(14,337)	(13,109)
Net cash used in investing activities	(65,449)	(35,297)	(6,880)
Cash flows from financing activities:
Cash dividends paid	(44,978)	(36,041)	(37,664)
Proceeds from sales of treasury stock	21,897	34,706	24,969
Payments for repurchases of common stock	(485,300)	(33,344)	(13,346)
Borrowings on revolving lines of credit and short-term borrowings	952,000	74,400	1,248,135
Payments on revolving lines of credit and short-term borrowings	(885,200)	(74,400)	(1,510,746)
Payments of long-term debt and finance lease obligations	(797)	(101,639)	(1,590)
Net cash used in financing activities	(442,378)	(136,318)	(290,242)
Effect of exchange rate changes on cash and cash equivalents	(26,429)	2,138	1,828
Net change in cash and cash equivalents	(340,618)	295,192	54,197
Cash and cash equivalents, including restricted cash, at beginning of year	448,462	153,270	99,073
Cash and cash equivalents, including restricted cash, at end of year	$ 107,844	$ 448,462	$ 153,270