Comprehensive Income and Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of total comprehensive income
Net income	$ 2,441	$ 2,064	$ 5,351	$ 5,265
Foreign currency translation adjustment, net of tax	(204)	6	(166)	85
Net retirement plan liability adjustment, net of tax	241	191	666	599
Interest rate swap agreement adjustment, net of tax	(1)	0	(53)	0
Total comprehensive income	$ 2,477	$ 2,261	$ 5,798	$ 5,949