Consolidated Statements Of Stockholders' Equity (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]	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	1,854	0	0	0	1,861
Stock-based compensation arrangements, shares	71,667
Dividends	0	0	0	(20,238)	(273)	(20,511)
Net income	0	0	0	23,674	466	24,140
Foreign currency translation adjustment	0	0	579	0	27	606
Defined benefit pension and postretirement plans activity	0	0	(847)	0	0	(847)
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	1	1,103	0	0	0	1,104
Stock-based compensation arrangements, shares	10,042
Dividends	0	0	0	(20,754)	(340)	(21,094)
Net income	0	0	0	24,538	670	25,208
Foreign currency translation adjustment	0	0	286	0	(167)	119
Defined benefit pension and postretirement plans activity	0	0	(2,632)	0	0	(2,632)
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	3	2,107	0	0	0	2,110
Stock-based compensation arrangements, shares	30,561
Dividends	0	0	0	(20,852)	(324)	(21,176)
Net income	0	0	0	19,270	830	20,100
Foreign currency translation adjustment	0	0	(386)	0	(197)	(583)
Defined benefit pension and postretirement plans activity	0	0	(1,757)	0	0	(1,757)
Balance at Sep. 30, 2012	$ 949	$ 35,898	$ (5,272)	$ 48,142	$ 1,385	$ 81,102
Balance, shares at Sep. 30, 2012	9,493,368					9,493,368