Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Preferred stock, par value (in Dollars per share) (in Dollars per share) (in Dollars per share) (in Dollars per share)	$ 100	$ 100
Preferred stock, shares authorized (in Shares)	10,000,000	10,000,000
Preferred stock, shares outstanding (in Shares)	0	0
Common stock, par value (in Dollars per share) (in Dollars per share) (in Dollars per share) (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in Shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in Shares)	167,099,432	167,099,432
Common stock, shares outstanding (in Shares)	117,529,307	116,932,448
Treasury stock, shares (in Shares)	49,570,125	50,166,984