Employee Benefit Plans (Components of Net Periodic Postretirement Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 66	$ 23	$ 40
Interest cost	23	17	39
Prior service cost		51	115
Net gain recognized	(59)	(107)	(37)
Net periodic postretirement benefit cost	$ 30	$ (16)	$ 157