Consolidated Statements Of Stockholders' Equity And Comprehensive Income (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Non-Controlling Interest [Member]	Comprehensive Income (Loss) [Member]	Total
Balance at Sep. 30, 2010	$ 945	$ 32,688	$ (783)	$ 45,940	$ 913		$ 79,703
Balance, shares at Sep. 30, 2010	9,452,765
Stock-based compensation arrangements	4	1,502	0	0	0		1,506
Stock-based compensation arrangements, shares	37,442
Dividends	0	0	0	(15,574)	(241)		(15,815)
Net income	0	0	0	19,352	456	19,808	19,808
Foreign currency translation adjustment	0	0	1,594	0	37	1,631	1,631
Defined benefit pension and postretirement plans activity	0	0	(5)	0	0	(5)	(5)
Comprehensive Income						21,434
Balance at Jun. 30, 2011	949	34,190	806	49,718	1,165		86,828
Balance, shares at Jun. 30, 2011	9,490,207
Balance at Sep. 30, 2011	946	33,791	(3,129)	49,724	1,076		82,408
Balance, shares at Sep. 30, 2011	9,462,807						9,462,807
Stock-based compensation arrangements	5	2,076	0	0	0		2,081
Stock-based compensation arrangements, shares	50,166
Dividends	0	0	0	(15,660)	(324)		(15,984)
Net income	0	0	0	18,601	479	19,080	19,080
Foreign currency translation adjustment	0	0	(2,194)	0	(80)	(2,274)	(2,274)
Defined benefit pension and postretirement plans activity	0	0	236	0	0	236	236
Comprehensive Income						17,042
Balance at Jun. 30, 2012	$ 951	$ 35,867	$ (5,087)	$ 52,665	$ 1,151		$ 85,547
Balance, shares at Jun. 30, 2012	9,512,973						9,512,973