Consolidated Balance Sheet Parentheticals - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Receivables, reserves (in dollars)	$ 3.6	$ 3.4
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Authorized shares	100,000,000	100,000,000
Preferred stock, Issued Shares	0	0
Preferred stock, outstanding Shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Authorized shares	400,000,000	400,000,000
Common Stock, Issued Shares	45,686,317	45,527,993
Common Stock, outstanding Shares	45,686,317	45,527,993