CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
EQUITY
Preferred stock, par value (in usd per share)	$ 0.01		$ 0.01		$ 0.01
Preferred stock, shares authorized (in shares)	1,090,000		1,090,000		1,090,000
Preferred stock, shares issued (in shares)	0		0		0
Preferred stock, shares outstanding (in shares)	0		0		0
Common stock, par value (in usd per share)	$ 0.01		$ 0.01		$ 0.01
Common stock, shares authorized (in shares)	273,910,000		273,910,000		273,910,000
Common stock, shares issued (in shares)	53,585,565		53,585,565		55,007,983
Common stock, shares outstanding (in shares)	53,585,565		53,585,565		55,007,983
Pension adjustment, income tax benefit	$ 6,000,000		$ 6,000,000		$ 6,000,000
Amounts reclassified out of accumulated other comprehensive loss	$ 0	$ 0	$ 0	$ 0