Consolidated Balance Sheet Parentheticals (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Receivables, reserves (in dollars)	$ 4.2	$ 3.7
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	39,754,014	39,375,790
Common Stock, outstanding Shares	39,754,014	39,375,790