Consolidated Balance Sheets (Parenthetical) - $ / shares		Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)		$ 1	$ 1
Preferred stock, shares authorized (in shares)		100,000	100,000
Preferred stock, shares issued (in shares)		0	0
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Common stock, shares authorized (in shares)		100,000,000	100,000,000
Common stock, shares issued (in shares)	[1]	69,600,000	69,900,000
Common stock, shares outstanding (in shares)	[1]	69,600,000	69,900,000

[1] Amounts may not add due to rounding