Outstanding Debt Balance (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013
Debt Instrument [Line Items]
Term Loan, variable-rate interest, due through 2017	$ 54,000	$ 55,500
Capital Leases, due through 2014	1	2
Total Debt	54,001	55,502
Less Current Portion	(6,001)	(6,002)
Total Long-term Debt	$ 48,000	$ 49,500

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the normal operating cycle if longer.

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