Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 1,335	$ 1,708	$ 1,618
Increases related to prior year income tax positions	39	21	107
Increases related to current year income tax positions	315	257	240
Decreases related to prior year income tax positions	0	0	(71)
Decreases related to settlements	0	0	(30)
Decreases related to expiration of statute of limitations	(128)	(651)	(156)
Unrecognized tax benefits, ending balance	$ 1,561	$ 1,335	$ 1,708

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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