Note 24 - Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Jan. 22, 2014 Subsequent Event [Member] Zunil Power Plant in Guatemala [Member]	Feb. 25, 2014 Subsequent Event [Member]
Note 24 - Subsequent Events (Details) [Line Items]
Dividends, Common Stock (in Dollars)				$ 2.7
Common Stock, Dividends, Per Share, Declared (in Dollars per share)	$ 0.08	$ 0.13		$ 0.06
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			3.00%