Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Summary of Significant Accounting Policies [Abstract]
Foreign currency translation adjustment, net of income tax benefit of $200 and $410, respectively	$ (5,566)	$ (5,770)
Net retirement plan liability adjustment, net of income tax benefit of $4,090 and $4,157, respectively	(6,720)	(6,932)
Interest rate swap agreement, net of income tax benefit of $35 in 2012	(58)	0
Total accumulated other comprehensive loss	$ (12,344)	$ (12,702)