Retirement Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Benefit obligations:
Benefit obligations at beginning of year	$ 23,596	$ 26,306
Service cost	126	288
Interest cost	987	851
Actuarial loss (gain)	2,737	(2,624)
Benefits paid	(1,306)	(1,454)
Early retirement expense	0	229
Benefit obligations at end of year	26,140	23,596
Plan assets:
Plan assets at beginning of year	20,435	18,949
Actual return on plan assets	2,465	2,154
Employer contributions	516	786
Benefits paid	(1,306)	(1,454)
Plan assets at end of year	$ 22,110	$ 20,435