Retirement Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Components of net periodic benefit cost
Service cost	$ 288	$ 266
Interest cost	851	988
Expected return on plan assets	(1,485)	(1,413)
Amortization of prior service cost	8	47
Amortization of net loss	917	861
Settlement cost	299	513
Curtailment cost	252	0
Net pension expense for defined benefit plan	$ 1,130	$ 1,262