Retirement Benefit Plans (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Reconciliation of funded status:
Plan assets in excess of (less than) projected benefit obligations	$ 520	$ 772
Other long-term liabilities	(7,877)	(8,160)
Amounts recognized in accumulated other comprehensive loss:
Net loss, Plans in which Assets Exceed Benefit Obligations	872	562
Net loss, Plans in which Benefit Obligations Exceed Assets	9,907	10,449
Prior service cost, Plans in which Assets Exceed Benefit Obligations	0	39
Prior service cost, Plans in which Benefit Obligations Exceed Assets	31	39
Net amount recognized in the consolidated balance sheets, Plans in which Assets Exceed Benefit Obligations	1,392	1,373
Net amount recognized in the consolidated balance sheets, Plans in which Benefit Obligations Exceed Assets	2,061	2,328
Amounts recognized in the consolidated balance sheets are:
Other assets	520	772
Other long-term liabilities	(7,877)	(8,160)
Accumulated other comprehensive loss pretax, Plans in which Assets Exceed Benefit Obligations	872	601
Accumulated other comprehensive loss pretax, Plans in which Benefit Obligations Exceed Assets	9,938	10,488
Net amount recognized in the consolidated balance sheets, Plans in which Assets Exceed Benefit Obligations	1,392	1,373
Net amount recognized in the consolidated balance sheets, Plans in which Benefit Obligations Exceed Assets	2,061	2,328
Other Assets [Member]
Reconciliation of funded status:
Plan assets in excess of (less than) projected benefit obligations	520	772
Amounts recognized in the consolidated balance sheets are:
Other assets	520	772
Other Liabilities [Member]
Reconciliation of funded status:
Other long-term liabilities	(7,877)	(8,160)
Amounts recognized in the consolidated balance sheets are:
Other long-term liabilities	$ (7,877)	$ (8,160)