Note 9 - Borrowed Funds (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Summary of Comparative Data of Securities Sold under Agreements to Repurchase [Table Text Block]

	201 7			201 6			201 5
	(Dollars in thousands )
Average amount outstanding during the year (1)	$	136,849		$	381,967		$	400,822
Maximum amount outstanding at month-end (2)		150,000			400,000			400,000
Balance, December 31		100,000			350,000			400,000
Rate, December 31		2.86	%		4.06	%		3.89	%
Weighted average interest rate for the year		3.11	%		4.01	%		3.95	%