Note 5 - Earnings Per Common Share (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Common Stock, Shares Authorized	500,000,000		400,000,000
Common Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.25		$ 0.25
Common Stock, Shares, Outstanding	285,163,224		285,209,848
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	537,005	823,668