Note 12 - Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 03, 2015	Oct. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Note 12 - Subsequent Events (Details) [Line Items]
Dividends, Common Stock					$ 9,772	$ 7,279
Common Stock, Dividends, Per Share, Declared (in Dollars per share)			$ 0.06	$ 0.05	$ 0.20	$ 0.16
Subsequent Event [Member]
Note 12 - Subsequent Events (Details) [Line Items]
Dividends, Common Stock	$ 2,900
Common Stock, Dividends, Per Share, Declared (in Dollars per share)	$ 0.06
Term Loan [Member]
Note 12 - Subsequent Events (Details) [Line Items]
Loans Payable			$ 6,000		$ 6,000
Term Loan [Member] | Subsequent Event [Member]
Note 12 - Subsequent Events (Details) [Line Items]
Payments for Loans		$ 6,200