Note 6 - Securities (Tables)

6 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

		June 30, 2015
		Gross	Gross
		Unrealized	Unrealized
	Amortized	Holding	Holding		Fair
(In Thousands)	Cost	Gains	Losses		Value
Obligations of U.S. Government agencies	$27,189	$39	$(357	)	$26,871
Obligations of states and political subdivisions:
Tax-exempt	115,908	4,147	(306	)	119,749
Taxable	34,872	394	(131	)	35,135
Mortgage-backed securities	76,323	754	(287	)	76,790
Collateralized mortgage obligations, Issued by U.S. Government agencies	231,148	1,308	(1,662	)	230,794
Collateralized debt obligations	34	0	0		34
Total debt securities	485,474	6,642	(2,743	)	489,373
Marketable equity securities	5,365	2,383	(10	)	7,738
Total	$490,839	$9,025	$(2,753	)	$497,111

		December 31, 2014
		Gross	Gross
		Unrealized	Unrealized
	Amortized	Holding	Holding		Fair
(In Thousands)	Cost	Gains	Losses		Value
Obligations of U.S. Government agencies	$27,221	$38	$(583	)	$26,676
Obligations of states and political subdivisions:
Tax-exempt	120,086	5,134	(381	)	124,839
Taxable	33,637	415	(174	)	33,878
Mortgage-backed securities	82,479	1,493	(69	)	83,903
Collateralized mortgage obligations, Issued by U.S. Government agencies	239,620	1,239	(2,036	)	238,823
Collateralized debt obligations:	34	0	0		34
Total debt securities	503,077	8,319	(3,243	)	508,153
Marketable equity securities	5,605	3,058	(9	)	8,654
Total	$508,682	$11,377	$(3,252	)	$516,807

Schedule of Unrealized Loss on Investments [Table Text Block]

June 30, 2015	Less Than 12 Months			12 Months or More			Total
(In Thousands)	Fair	Unrealized		Fair	Unrealized		Fair	Unrealized
	Value	Losses		Value	Losses		Value	Losses
Obligations of U.S. Government agencies	$10,033	$(62	)	$14,180	$(295	)	$24,213	$(357	)
Obligations of states and political subdivisions:
Tax-exempt	24,310	(283	)	744	(23	)	25,054	(306	)
Taxable	9,581	(61	)	4,777	(70	)	14,358	(131	)
Mortgage-backed securities	20,022	(213	)	3,889	(74	)	23,911	(287	)
Collateralized mortgage obligations, Issued by U.S. Government agencies	62,196	(341	)	55,754	(1,321	)	117,950	(1,662	)
Total debt securities	126,142	(960	)	79,344	(1,783	)	205,486	(2,743	)
Marketable equity securities	59	(10	)	0	0		59	(10	)
Total temporarily impaired available-for-sale securities	$126,201	$(970	)	$79,344	$(1,783	)	$205,545	$(2,753	)

December 31, 2014	Less Than 12 Months			12 Months or More			Total
(In Thousands)	Fair	Unrealized		Fair	Unrealized		Fair	Unrealized
	Value	Losses		Value	Losses		Value	Losses
Obligations of U.S. Government agencies	$0	$0		$24,020	$(583	)	$24,020	$(583	)
Obligations of states and political subdivisions:
Tax-exempt	11,898	(289	)	6,991	(92	)	18,889	(381	)
Taxable	4,240	(22	)	9,159	(152	)	13,399	(174	)
Mortgage-backed securities	0	0		4,160	(69	)	4,160	(69	)
Collateralized mortgage obligations, Issued by U.S. Government agencies	58,812	(396	)	60,897	(1,640	)	119,709	(2,036	)
Total debt securities	74,950	(707	)	105,227	(2,536	)	180,177	(3,243	)
Marketable equity securities	134	(9	)	0	0		134	(9	)
Total temporarily impaired available-for-sale securities	$75,084	$(716	)	$105,227	$(2,536	)	$180,311	$(3,252	)

Realized Gain (Loss) on Investments [Table Text Block]

(In Thousands)	3 Months Ended			6 Months Ended
	June 30,	June 30,		June 30,	June 30,
	2015	2014		2015	2014
Gross realized gains from sales	$932	$140		$1,006	$342
Gross realized losses from sales	0	(37	)	0	(208	)
Net realized gains	$932	$103		$1,006	$134

Investments Classified by Contractual Maturity Date [Table Text Block]

	Amortized	Fair
(In Thousands)	Cost	Value
Due in one year or less	$10,599	$10,741
Due from one year through five years	62,421	63,102
Due from five years through ten years	60,873	61,305
Due after ten years	44,110	46,641
Subtotal	178,003	181,789
Mortgage-backed securities	76,323	76,790
Collateralized mortgage obligations, Issued by U.S. Government agencies	231,148	230,794
Total	$485,474	$489,373