Note 8 - Deposits - Maturity Distribution for Certificate of Deposits (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
In one year or less	$ 358,259,000	$ 305,122,000
In one to two years	92,042,000	145,775,000
In two to three years	34,204,000	71,988,000
In three to four years	35,523,000	37,527,000
In four to five years	49,389,000	29,859,000
Total certificates of deposit	$ 569,417,000	$ 590,271,000