Debt - Long-term Borrowings (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	$ 64.5	$ 64.0
Current portion of long-term borrowings and capital lease obligations	0.4	0.5
Notional Amount
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	64.5	64.0
Fair Value
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	64.5	64.0
Revolving Credit Facility [Member] | 2016 Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	$ 63.8	$ 63.2