Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Property, plant, and equipment, accumulated depreciation and amortization	$ 333.4	$ 318.4
Finite-lived intangibles, accumulated amortization	$ 22.5	$ 19.0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, issued (in shares)	28,376,662	28,357,658
Common stock, outstanding (in shares)	21,593,522	21,519,761
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, authorized (in shares)	15,000,000	15,000,000
Preferred stock, issued (in shares)	0	0
Treasury stock (in shares)	6,783,140	6,837,897

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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