Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Consolidated Balance Sheets
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, Authorized shares Series A Junior Participating Preferred	10,000	10,000
Preferred stock, outstanding shares Series A Junior Participating Preferred	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, Authorized shares	199,990,000	199,990,000
Common stock, Issued shares	46,149,100	45,175,053