Note 27 - Related Party Transactions - Aggregate Activity Involving Related Party Borrowers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Balance at beginning of year	$ 13,424	$ 13,707
Advances on existing lines of credit	29,166	24,447
Principal repayments	(29,360)	(24,730)
Balance at end of year	$ 13,230	$ 13,424