Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accum Other Comp Income (Loss) [Member]
Beginning balance at Sep. 30, 2019	$ 190,967		$ 132,834	$ 0	$ 63,108	$ (4,975)
Beginning balance, Shares at Sep. 30, 2019		42,712		0
Conversion of restricted share units and exercise of stock options	3,559		3,559
Conversion of restricted share units and exercise of stock options, Shares		357
Stock compensation expense	3,802		3,802
Net earnings	46,186				46,186
Foreign currency translation adjustment	3,884					3,884
Hedging activity, net of tax	(769)					(769)
Ending balance at Sep. 30, 2020	247,629		140,195	$ 0	109,294	(1,860)
Ending balance, Shares at Sep. 30, 2020		43,069		0
Conversion of restricted share units and exercise of stock options	3,052		3,052
Conversion of restricted share units and exercise of stock options, Shares		293
Stock compensation expense	4,156		4,156
Net earnings	71,407				71,407
Foreign currency translation adjustment	1,780					1,780
Hedging activity, net of tax	278					278
Ending balance at Sep. 30, 2021	328,302		147,403	$ 0	180,701	198
Ending balance, Shares at Sep. 30, 2021		43,362		0
Conversion of restricted share units and exercise of stock options	1,102		1,361	$ (259)
Conversion of restricted share units and exercise of stock options, Shares		393		(10)
Stock compensation expense	6,900		6,900
Net earnings	42,459				42,459
Foreign currency translation adjustment	(11,929)					(11,929)
Hedging activity, net of tax	1,227					1,227
Ending balance at Sep. 30, 2022	$ 368,061		$ 155,664	$ (259)	$ 223,160	$ (10,504)
Ending balance, Shares at Sep. 30, 2022		43,755		(10)