Note 15 - Purchase of Financial Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended	35 Months Ended
	Mar. 31, 2017	Mar. 31, 2017
Loan Purchase Agreement Financial Asset for Which Transfer Is Accounted as a Purchase Total Commitment to Purchase	$ 50.0
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted as a Purchase Par Value Purchased		$ 102.8
Loan Purchase Agreement Financial Asset for Which Transfer Is Accounted as a Purchase Net Discount Premium		47.4
Payments for Loans		$ 55.4