Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowances, trade receivables	$ 2.1	$ 2.1
Property, plant and equipment, accumulated depreciation	$ 239.2	$ 223.8
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)	29,316,041	29,316,041
Common stock, shares outstanding (in shares)	29,154,845	29,147,380
Common stock held in treasury (in shares)	161,196	168,661