Stockholder's Equity (Details) - shares	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Preferred Stock:
Authorized shares	50,000,000	50,000,000
Issued shares	25,875,000	25,875,000
Outstanding shares	25,875,000	25,875,000	25,875,000	26,108,236
Common Stock, $1.00 par value:
Authorized shares	700,000,000	700,000,000
Issued shares	352,350,728	329,487,615
Outstanding shares	351,573,700	328,790,066