Note 5. Earnings Per Common Share (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Common Stock, Shares Authorized	500,000,000		500,000,000		500,000,000
Common Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.25		$ 0.25		$ 0.25
Common Stock, Shares, Issued	285,546,859		285,546,859		285,289,924
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	605,005	552,388	605,005	333,388