Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.10.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Property, plant, and equipment, accumulated depreciation and amortization $ 415.9 $ 399.3
Finite-lived intangibles, accumulated amortization $ 10.0 $ 6.4
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) 28,223,605 28,183,218
Common stock, outstanding (in shares) 25,771,440 25,734,222
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) 2,452,165 2,448,996