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, 2009	$ 938	$ 30,834	$ (515)	$ 42,504	$ 693		$ 74,454
Balance, shares at Sep. 30, 2009	9,381,098
Stock-based compensation arrangements	7	1,713	0	0	0		1,720
Stock-based compensation arrangements, shares	71,552
Dividends	0	0	0	(15,175)	(273)		(15,448)
Net income	0	0	0	19,118	326	19,444	19,444
Foreign currency translation adjustment	0	0	(1,848)	0	(2)	(1,850)	(1,850)
Defined benefit pension and postretirement plans activity	0	0	(46)	0	0	(46)	(46)
Comprehensive Income						17,548
Balance at Jun. 30, 2010	945	32,547	(2,409)	46,447	744		78,274
Balance, shares at Jun. 30, 2010	9,452,650
Balance at Sep. 30, 2010	945	32,688	(783)	45,940	913		79,703
Balance, shares at Sep. 30, 2010	9,452,765						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						9,490,207