Accounts Receivable - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts Receivable and Allowance for Doubtful Accounts [Abstract]
Accounts Receivable Gross Current	$ 202.4	$ 196.1
Accounts Receivable Greater Than 90 Days Past Due	18.0	15.7
Business Combination, Acquired Receivables, Estimated Uncollectible	$ 0.1	0.4	$ 0.1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Additional Narrative Disclosure	Included in write-offs charged to allowance during 2016 was $1.6 million of outstanding receivables related to a prior year customer bankruptcy which the Company previously reserved, but settled during 2016.
Customer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Doubtful Accounts		$ 0.3	$ 0.8
Effect Of Customer Bankruptcies Per Diluted Share		$ 0.02	$ 0.05