Note 22 - Balance Sheet Offsetting - Financial Instruments that are Eligible for Offset in the Consolidated Balance Sheet (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Derivative assets, gross	$ 938,000
Derivative assets, net	938,000
Derivative assets not offset	938,000
Securities sold under agreements to repurchase	350,000,000	$ 400,000,000
Securities sold under agreements to repurchase, net	350,000,000	400,000,000
Securities sold under agreements to repurchase, collateral posted	(350,000,000)	(400,000,000)
Derivative liabilities, gross	3,744,000	6,496,000
Derivative liabilities, net	3,744,000	6,496,000
Derivatives, collateral posted	$ (3,744,000)	$ (6,496,000)