Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	123,792,329	118,646,261
Common stock, shares outstanding (in shares)	123,792,329	114,501,014
Common stock in treasury, shares (in shares)	0	4,145,247