Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Long-term Debt Types [Abstract]
Captial lease arrangments	$ 1.4		$ 0.5
Long Term Debt By Current And Noncurrent [Abstract]
Current maturities of long-term debt	35.2	24.6
Long-term debt	$ 413.8	$ 330.5

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.

No definition available.

Name:	us-gaap_CapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant