Note 7 - Loans and Allowance for Loan Losses (Details) - Risk Category of Loans by Class-Consumer - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Credit risk profile based on payment activity
Loan receivable	$ 962,289	$ 959,275
Consumer Portfolio Segment [Member]
Credit risk profile based on payment activity
Loan receivable	9,571	12,419
Consumer Portfolio Segment [Member] | Consumer Secured [Member]
Credit risk profile based on payment activity
Loan receivable	4,583	6,665
Consumer Portfolio Segment [Member] | Consumer Secured [Member] | Performing Financial Instruments [Member]
Credit risk profile based on payment activity
Loan receivable	4,575	6,655
Consumer Portfolio Segment [Member] | Consumer Secured [Member] | Nonperforming Financial Instruments [Member]
Credit risk profile based on payment activity
Loan receivable	8	10
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member]
Credit risk profile based on payment activity
Loan receivable	4,988	5,754
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member] | Performing Financial Instruments [Member]
Credit risk profile based on payment activity
Loan receivable	4,845	5,611
Consumer Portfolio Segment [Member] | Consumer Unsecured [Member] | Nonperforming Financial Instruments [Member]
Credit risk profile based on payment activity
Loan receivable	$ 143	$ 143