Retirement Plan (Schedule of Net Periodic Benefit Cost) (Details) (Pension Plans, Defined Benefit, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 204	$ 200	$ 195
Interest cost	124	119	108
Expected return on plan assets	(51)	(50)	(44)
Amortization of deferred amount	50	40	36
Net periodic benefit cost	$ 327	$ 309	$ 295