Components Of Long-Term Debt (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Capital leases	$ 14.0
Total	224.0us-gaap_DebtAndCapitalLeaseObligations	210.0us-gaap_DebtAndCapitalLeaseObligations
Less - current maturities	1.8
Total long-term debt	222.2	210.0
6.25% Senior Notes Due 2017
Debt Instrument [Line Items]
Senior notes	$ 210.0	$ 210.0

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 and due to be paid more than one year (or one operating cycle, if longer) after 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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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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