Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowances, trade receivables	$ 3.3	$ 3.1
Property, plant and equipment, accumulated depreciation	$ 281.1	$ 273.3
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issues (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	31,623,079	31,623,079
Common stock, shares outstanding (in shares)	31,577,182	31,577,182
Common stock held in treasury (in shares)	45,897	45,897