Note 12 - Notes Payable (Details) - Medium Term Note Repayments - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2015	Sep. 30, 2015	Feb. 28, 2015	Jun. 30, 2014
Medium-term Note 1 [Member]
Note 12 - Notes Payable (Details) - Medium Term Note Repayments [Line Items]
Amount Repaid	$ 150.0
Interest Rate	5.584%
Senior Note 1 [Member]
Note 12 - Notes Payable (Details) - Medium Term Note Repayments [Line Items]
Amount Repaid		$ 100.0
Interest Rate		5.25%
Medium-term Note 2 [Member]
Note 12 - Notes Payable (Details) - Medium Term Note Repayments [Line Items]
Amount Repaid			$ 100.0
Interest Rate			4.904%
Medium-Term Note 3 [Member]
Note 12 - Notes Payable (Details) - Medium Term Note Repayments [Line Items]
Amount Repaid				$ 194.6
Interest Rate				4.82%
Senior Note 2 [Member]
Note 12 - Notes Payable (Details) - Medium Term Note Repayments [Line Items]
Amount Repaid				$ 100.0
Interest Rate				5.95%