Note 11 - Other Borrowings and Unused Lines of Credit - Other Borrowings (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Other borrowings	$ 80,000,000	$ 110,000,000
Revolving Credit Facility [Member]
Other borrowings	5,000,000
Term Note [Member]
Other borrowings	30,000,000
Whole sale Repurchase Agreements [Member]
Other borrowings	$ 45,000,000	$ 110,000,000