Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 2,301	$ 3,332	$ 2,720
Increases related to prior year income tax positions	110	181	162
Increases related to current year income tax positions	144	148	733
Decreases related to prior year income tax positions	(255)	(1,105)	0
Decreases related to settlements	(74)	(95)	0
Decreases related to expiration of statute of limitations	(608)	(160)	(283)
Unrecognized tax benefits, ending balance	1,618	2,301	3,332
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate				$ 1,600
Expected change in unrecognized tax benefits, minimum				200
Unrecognized tax benefits	2,301	$ 3,332	$ 2,720	1,618
Noncurrent income taxes payable
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, ending balance	1,200
Income Tax Contingency [Line Items]
Unrecognized tax benefits	1,200			1,200
Noncurrent deferred tax assets
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, ending balance	400
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 400			$ 400