Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net earnings		$ 53,373	$ 49,120
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization		32,451	38,642
Impairment of assets held for sale		37,902
Net loss (gain) on sales of assets	[1]	(13,547)	79
Stock-based compensation		10,982	10,851
Deferred income taxes		(47)	(4,181)
Changes in operating assets and liabilities:
Trade accounts receivable		37,652	52,851
Unbilled receivables (contract assets)		(33,150)	(4,705)
Costs to fulfill a contract		(6,401)	(7,293)
Inventories		(17,065)	(32,393)
Accounts payable and accrued liabilities		(79,535)	(38,145)
Contract liabilities		(144)	10,050
Income taxes		1,001	8,581
Retirement benefit obligations		(1,490)	(926)
Other		5,463	2,181
Net cash provided by operating activities		27,445	84,712
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment		(17,232)	(31,346)
Proceeds from sale of assets		18,809	249
Proceeds from sales of short-term investments			27
Payments for purchases of short-term investments		(2)	(947)
Net cash provided by (used in) investing activities		1,575	(32,017)
Cash flows from financing activities:
Cash dividends paid		(10,064)	(8,808)
Proceeds from sales of treasury stock		7,558	3,384
Borrowings on revolving lines of credit and short-term borrowings		461,633	542,847
Payments on revolving lines of credit and short-term borrowings		(441,500)	(501,218)
Payments of long-term debt and finance lease obligations		(439)	(100,132)
Net cash provided by (used in) financing activities		17,188	(63,927)
Effect of exchange rate changes on cash and cash equivalents		2,727	(728)
Net change in cash and cash equivalents		48,935	(11,960)
Cash and cash equivalents, including restricted cash, at beginning of year		99,073	83,594
Cash and cash equivalents, including restricted cash, at end of year		$ 148,008	$ 71,634

[1] Included in net (gain) loss on sale of assets for the first quarter of fiscal year 2020 was the pre-tax gain on sale of Duarte real property in the amount of $13,522.