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Supplemental Disclosure of Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Cash paid during the period for:
Income taxes, net	$ 6,175	$ 9,215	$ 2,061
Interest	14,487	12,994	14,836
Debt redemption premium		1,409	854
Non-cash financing activities:
Increase (decrease) in interest expense amortization of debt discount 8.875% and debt premium 10.25%	94	52	(132)
Decrease in net debt premium attributable to redemption of debt		$ 247	$ 203
8.875% Senior Notes [Member]
Supplemental Disclosure of Cash Flow Information (Textual) [Abstract]
Interest on senior notes	8.875%	8.875%
Senior Notes [Member]
Supplemental Disclosure of Cash Flow Information (Textual) [Abstract]
Interest on senior notes			10.25%

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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