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
Condensed Consolidated Balance Sheets [Abstract]    
Allowance for accounts with partners $ 0.5 $ 0.5
Allowance for value added tax receivable $ 6.4 $ 6.5
Preferred stock, shares issued 0 0
Preferred stock, shares authorized 500,000 500,000
Preferred stock, par value $ 25 $ 25
Common stock, par value $ 0.10 $ 0.10
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 66,966,301 66,443,971
Common stock, shares outstanding 59,420,471 58,862,876
Treasury Stock Shares 7,545,830 7,581,095