Note 6 - Securities Sold Under Agreements to Repurchase (Tables)

3 Months Ended

Mar. 31, 2016

Disclosure Text Block [Abstract]

Schedule of Repurchase Agreements [Table Text Block]

	Three Months Ended			Twelve Months Ended
	March 31, 2016			December 31, 2015
Outstanding balance at end of period	$	162,312,000		$	154,771,000
Average interest rate at end of period		0.11	%		0.11	%
Average daily balance during the period	$	158,281,000		$	146,826,000
Average interest rate during the period		0.11	%		0.11	%
Maximum daily balance during the period	$	175,088,000		$	168,211,000