Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net earnings	$ 149,716	$ 117,657
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	89,301	91,258
Net loss (gain) on sales of assets and businesses	672	(1,545)
Stock-based compensation	19,369	17,136
Deferred income taxes	545	(56)
Changes in operating assets and liabilities:
Trade accounts receivable	(69,628)	(6,745)
Unbilled receivables (contract assets)	(49,890)	(64,892)
Costs to fulfill a contract	(9,279)	(13,541)
Inventories	(7,443)	(93,818)
Accounts payable and accrued liabilities	23,303	36,117
Contract liabilities	15,229	8,420
Income taxes	(29,635)	5,277
Retirement benefit obligations	(779)	(3,442)
Other	24,149	(5,810)
Net cash provided by operating activities	155,630	86,016
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(57,142)	(37,105)
Proceeds from sale of assets	477	4
Proceeds from sale of the renewable power systems business and other related business		6,000
Business acquisition, net of cash acquired	878
Payments for short-term investments	(6,109)	(9,619)
Proceeds from sales of short-term investments	7,692	11,305
Net cash (used in) investing activities	(54,204)	(29,415)
Cash flows from financing activities:
Cash dividends paid	(37,762)	(33,572)
Proceeds from sales of treasury stock	26,888	20,283
Payments for repurchases of common stock	(26,369)	(440,233)
Borrowings on revolving lines of credit and short-term borrowings	1,538,900	477,400
Payments on revolving lines of credit and short-term borrowings	(1,582,200)	(428,200)
Payments of debt financing costs	(2,236)
Payments of long-term debt and finance lease obligations	(536)	(644)
Net cash (used in) financing activities	(83,315)	(404,966)
Effect of exchange rate changes on cash and cash equivalents	(11,848)	(396)
Net change in cash and cash equivalents	6,263	(348,761)
Cash and cash equivalents, including restricted cash, at beginning of year	107,844	448,462
Cash and cash equivalents, including restricted cash, at end of period	$ 114,107	$ 99,701