Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts and notes receivable, net of allowance for doubtful accounts	$ 6,459	$ 7,471
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	225,000,000	225,000,000
Common stock, shares issued	0	152,821,011
Cost of common stock held in treasury, shares	0	15,922,729
Common stock held in employee benefit and compensation trusts, shares	0	80,967