Retirement Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Oct. 31, 2012	Oct. 31, 2011
Benefit obligations:
Benefit obligations at beginning of year	$ 26,306		$ 26,306	$ 24,030
Service cost	288	266
Interest cost	851	988
Actuarial loss	(2,624)	2,659
Benefits paid	(1,454)	(1,637)
Early retirement expense	229	0
Benefit obligations at end of year	23,596	26,306	26,306	24,030
Plan assets:
Balance at beginning of year	18,949		18,949	16,642
Actual return on plan assets	2,154	2,929
Employer contributions	786	1,015
Benefits paid	(1,454)	(1,637)
Balance at end of year	$ 20,435	$ 18,949	$ 18,949	$ 16,642