Note 5. Earnings Per Common Share (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2011	Dec. 31, 2011
Common Stock, Shares Authorized	500,000,000			500,000,000
Common Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.25			$ 0.25
Common Stock, Shares, Issued	285,486,857			285,289,924
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	570,005	552,388	552,388