Note 10 - Intangible Assets - Risk Characteristics of Loans Being Serviced (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Original Term Thirty Year Fixed Rate [Member]
Loan Principal Balance	$ 228,454
Weighted Average Interest Rate	4.11%
Weighted Average Remaining Term	25 years 60 days
Number of Loans	1,901
Original Term Fifteen Year Fixed Rate [Member]
Loan Principal Balance	$ 107,652
Weighted Average Interest Rate	3.15%
Weighted Average Remaining Term	11 years 210 days
Number of Loans	1,154
Adjustable Rate [Member]
Loan Principal Balance	$ 57
Weighted Average Interest Rate	2.75%
Weighted Average Remaining Term	24 years 240 days
Number of Loans	2