Note 3 - Securities (Tables)

6 Months Ended

Jun. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
June 30, 2014
U.S. Government agency debt obligations	$	219,141,000	$	731,000	$	(6,166,000	)	$	213,706,000
Mortgage-backed securities		107,145,000		1,249,000		(222,000	)		108,172,000
Municipal general obligation bonds		139,996,000		894,000		(721,000	)		140,169,000
Municipal revenue bonds		11,244,000		115,000		(35,000	)		11,324,000
Other Investments		1,909,000		0		(5,000	)		1,904,000
	$	479,435,000	$	2,989,000	$	(7,149,000	)	$	475,275,000
December 31, 2013
U.S. Government agency debt obligations	$	108,279,000	$	263,000	$	(10,065,000	)	$	98,477,000
Mortgage-backed securities		12,456,000		1,102,000		0			13,558,000
Municipal general obligation bonds		16,488,000		388,000		(4,000	)		16,872,000
Municipal revenue bonds		878,000		38,000		0			916,000
Mutual funds		1,386,000		0		(31,000	)		1,355,000
	$	139,487,000	$	1,791,000	$	(10,100,000	)	$	131,178,000

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

	Less than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Loss			Value		Loss			Value		Loss
June 30, 2014
U.S. Government agency debt obligations	$	90,627,000	$	(373,000	)	$	69,159,000	$	(5,793,000	)	$	159,786,000	$	(6,166,000	)
Mortgage-backed securities		64,108,000		(222,000	)		0		0			64,108,000		(222,000	)
Municipal general obligation bonds		92,461,000		(721,000	)		0		0			92,461,000		(721,000	)
Municipal revenue bonds		7,775,000		(35,000	)		0		0			7,775,000		(35,000	)
Other Investments		0		0			1,395,000		(5,000	)		1,395,000		(5,000	)
	$	254,971,000	$	(1,351,000	)	$	70,554,000	$	(5,798,000	)	$	325,525,000	$	(7,149,000	)
December 31, 2013
U.S. Government agency debt obligations	$	57,117,000	$	(5,798,000	)	$	29,679,000	$	(4,267,000	)	$	86,796,000	$	(10,065,000	)
Mortgage-backed securities		0		0			0		0			0		0
Municipal general obligation bonds		295,000		(4,000	)		0		0			295,000		(4,000	)
Municipal revenue bonds		0		0			0		0			0		0
Mutual funds		1,355,000		(31,000	)		0		0			1,355,000		(31,000	)
	$	58,767,000	$	(5,833,000	)	$	29,679,000	$	(4,267,000	)	$	88,446,000	$	(10,100,000	)

Investments Classified by Contractual Maturity Date [Table Text Block]

	Weighted
	Average		Amortized		Fair
	Yield		Cost		Value
Due in 2014		0.86%	$	20,435,000	$	20,538,000
Due in 2015 through 2019		1.25		178,246,000		182,962,000
Due in 2020 through 2024		2.95		78,336,000		88,647,000
Due in 2025 and beyond		3.63		89,198,000		73,052,000
Mortgage-backed securities		1.73		103,209,000		108,172,000
Other Investments		1.55		1,909,000		1,904,000
		2.07%	$	471,333,000	$	475,275,000