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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Vendor and Customer Rebates and Allowances [Abstract]
Vendor rebates and allowances	$ 4.8		$ 4.8		$ 6.1
Customer Rebates and Allowances	29.8		29.8		$ 24.7
Operating Leases, Rent Expense, Net [Abstract]
Rental expense	4.8	$ 4.3	$ 13.8	$ 12.9
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Single Customer [Member]
Risks and Uncertainties [Abstract]
Concentration of credit risk			13.00%		11.00%
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
6.375% senior notes, book value	300.0		$ 300.0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
6.375% senior notes, book value	310.5		310.5
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Money market funds, fair value	$ 172.6		$ 172.6		$ 137.6

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