Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Stockholders' Equity [Abstract]

Changes in number of shares in stockholders' equity

Changes in the number of shares of the Company's outstanding stock for the last three years were as follows:

	Common Stock		Treasury Stock			Shares Outstanding
Balance - December 31, 2009		263,111,472		(18,453,758	)		244,657,714
Purchase of treasury stock		–		(3,176,705	)		(3,176,705	)
Stock issued under stock compensation plans		–		2,432,821			2,432,821
Balance - December 31, 2010		263,111,472		(19,197,642	)		243,913,830
Purchase of treasury stock		–		(49,000	)		(49,000	)
Stock issued under stock compensation plans		–		1,667,245			1,667,245
Balance - December 31, 2011		263,111,472		(17,579,397	)		245,532,075
Purchase of treasury stock		–		(412,800	)		(412,800	)
Stock issued under stock compensation plans		–		1,576,861			1,576,861
Balance - December 31, 2012		263,111,472		(16,415,336	)		246,696,136