Retirement Plan (Schedule of Net Periodic Benefit Cost) (Details) (Pension Plans, Defined Benefit, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 200	$ 195	$ 165
Interest cost	119	108	83
Expected return on plan assets	(50)	(44)	(40)
Amortization of deferred amount	40	36	2
Net periodic benefit cost	$ 309	$ 295	$ 210