Note 16 - Purchase of Financial Assets (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
	Feb. 27, 2015	May. 12, 2014	Mar. 31, 2016	Dec. 31, 2015
Transfers and Servicing [Abstract]
Loan Purchase Agreement, Financial Asset for Which Transfer is Accounted As a Purchase, Total Commitment to Purchase	$ 6,400	$ 40,000		$ 50,000
Loan Purchase Agreement, Financial Asset for Which Transfer is Accounted As a Purchase, Par Value Purchased	6,400		$ 78,500
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted as a Purchase Interest Accrued	17
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted as a Purchase Net Discount (Premium)	91		30,300
Payments for Loans	$ 6,500		$ 48,200
Loan Purchase Agreement, Transfer Of Financial Assets Accounted For As a Purchase, Maximum Monthly Loan Purchase		$ 4,000
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted As a Purchase Total Commitment to Purchase, Increase in Period				$ 10,000