Condensed Consolidated Statement of Changes in Shareholders' Equity (Unaudited) - 9 months ended Jun. 30, 2018 - USD ($) shares in Thousands, $ in Thousands	Total	Common Shares Issued [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance at Sep. 30, 2017	$ 169,585		$ 125,608	$ 46,923	$ (2,946)
Beginning balance, Shares at Sep. 30, 2017		42,207
Cash dividends paid	(15,870)			(15,870)
Exercise of stock options	183		183
Exercise of stock options, Share		13
Conversion of restricted share units	0	$ 0	0	0	0
Conversion of restricted share units, Shares		138
Stock compensation expense	2,882		2,882
Net earnings	18,415			18,415
Foreign currency translation adjustment	(695)				(695)
Hedging activity, net of tax	627				627
Ending balance at Jun. 30, 2018	$ 175,127		$ 128,673	$ 49,468	$ (3,014)
Ending balance, Shares at Jun. 30, 2018		42,358