Note 15 - Purchase of Financial Assets (Details Textual) - USD ($) $ in Millions		12 Months Ended	29 Months Ended
	May 12, 2014	Dec. 31, 2015	Sep. 30, 2016
Loan Purchase Agreement Financial Asset for Which Transfer Is Accounted as a Purchase Total Commitment to Purchase	$ 40.0	$ 50.0
Loan Purchase Agreement Financial Asset for Which Transfer Is Accounted as a Purchase Total Commitment to Purchase Increase in Period		$ 10.0
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted as a Purchase Par Value Purchased			$ 90.9
Loan Purchase Agreement Financial Asset for Which Transfer Is Accounted as a Purchase Net Discount Premium			43.3
Payments for Loans			$ 47.6