Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation	$ 314.7	$ 308.2
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)	31,741,607	31,741,607
Common stock, shares outstanding (in shares)	31,728,225	31,666,654
Common stock held in treasury (in shares)	13,382	74,953