Stockholder's Equity (Details)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Preferred Stock:
Authorized shares	50,000,000	50,000,000
Issued shares	26,224,854	26,224,854
Outstanding shares	26,224,854	26,224,854	37,224,854	25,724,854
Common Stock, $1.00 par value:
Authorized shares	400,000,000	400,000,000
Issued shares	261,893,455	260,780,109
Outstanding shares	261,432,764	260,373,754