Retirement Plan (Schedule of Amounts Recognized on the Consolidated Balance Sheet) (Details) (Pension Plans, Defined Benefit, USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Other long-term liabilities	$ 3,537	$ 3,099
Accumulated other comprehensive income (net of $204 in 2012)	2,126	2,155
Amount recognized	5,663	5,254
Accumulated other comprehensive income, tax	$ 204