Note 3 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	Investment Securities Available for Sale At March 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
U.S. Treasury securities	$	3,499	$	9	$	-		$	3,508
Securities of U.S. Government sponsored entities		329,589		108		(1,387	)		328,310
Residential mortgage-backed securities		30,154		1,791		(18	)		31,927
Commercial mortgage-backed securities		3,216		10		(5	)		3,221
Obligations of states and political subdivisions		180,011		7,635		(222	)		187,424
Residential collateralized mortgage obligations		259,615		674		(12,460	)		247,829
Asset-backed securities		9,322		5		(56	)		9,271
FHLMC and FNMA stock		804		16,241		-			17,045
Corporate securities		406,526		3,180		(609	)		409,097
Other securities		2,039		767		(150	)		2,656
Total	$	1,224,775	$	30,420	$	(14,907	)	$	1,240,288

	Investment Securities Available for Sale At December 31, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
U.S. Treasury securities	$	3,500	$	9	$	(3	)	$	3,506
Securities of U.S. Government sponsored entities		131,080		75		(663	)		130,492
Residential mortgage-backed securities		32,428		1,763		(15	)		34,176
Commercial mortgage-backed securities		3,411		19		(5	)		3,425
Obligations of states and political subdivisions		186,082		5,627		(323	)		191,386
Residential collateralized mortgage obligations		266,890		730		(14,724	)		252,896
Asset-backed securities		14,653		3		(101	)		14,555
FHLMC and FNMA stock		804		12,568		-			13,372
Corporate securities		430,794		2,901		(1,264	)		432,431
Other securities		2,049		1,251		(158	)		3,142
Total	$	1,071,691	$	24,946	$	(17,256	)	$	1,079,381

Schedule of Held to Maturity Securities Reconciliation [Table Text Block]

	Investment Securities Held to Maturity At March 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Securities of U.S. Government sponsored entities	$	1,428	$	-	$	(4	)	$	1,424
Residential mortgage-backed securities		63,048		855		(388	)		63,515
Obligations of states and political subdivisions		748,520		7,414		(11,409	)		744,525
Residential collateralized mortgage obligations		297,333		1,622		(4,592	)		294,363
Total	$	1,110,329	$	9,891	$	(16,393	)	$	1,103,827

	Investment Securities Held to Maturity At December 31, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Securities of U.S. Government sponsored entities	$	1,601	$	-	$	(4	)	$	1,597
Residential mortgage-backed securities		65,076		854		(624	)		65,306
Obligations of states and political subdivisions		756,707		6,211		(21,667	)		741,251
Residential collateralized mortgage obligations		308,915		1,209		(5,602	)		304,522
Total	$	1,132,299	$	8,274	$	(27,897	)	$	1,112,676

Investments Classified by Contractual Maturity Date [Table Text Block]

	At March 31, 2014
	Securities Available for Sale				Securities Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Maturity in years:
1 year or less	$	35,521	$	35,862	$	8,947	$	9,215
Over 1 to 5 years		726,407		728,374		206,687		209,237
Over 5 to 10 years		84,231		86,679		299,437		298,232
Over 10 years		82,788		86,695		234,877		229,265
Subtotal		928,947		937,610		749,948		745,949
Mortgage-backed securities and residential collateralized mortgage obligations		292,985		282,977		360,381		357,878
Other securities		2,843		19,701		-		-
Total	$	1,224,775	$	1,240,288	$	1,110,329	$	1,103,827

	At December 31, 2013
	Securities Available for Sale				Securities Held to Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Maturity in years:
1 year or less	$	75,385	$	75,609	$	9,639	$	9,900
Over 1 to 5 years		536,333		538,111		187,051		189,827
Over 5 to 10 years		66,669		68,166		314,630		310,104
Over 10 years		87,722		90,484		246,988		233,017
Subtotal		766,109		772,370		758,308		742,848
Mortgage-backed securities and residential collateralized mortgage obligations		302,729		290,497		373,991		369,828
Other securities		2,853		16,514		-		-
Total	$	1,071,691	$	1,079,381	$	1,132,299	$	1,112,676

Schedule of Unrealized Loss on Investments [Table Text Block]

	Investment Securities Available for Sale At March 31, 2014
	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
Securities of U.S. Government sponsored entities	$	239,558	$	(1,360	)	$	8,968	$	(27	)	$	248,526	$	(1,387	)
Residential mortgage-backed securities		-		-			848		(18	)		848		(18	)
Commercial mortgage-backed securities		960		(5	)		-		-			960		(5	)
Obligations of states and political subdivisions		11,098		(123	)		3,683		(99	)		14,781		(222	)
Residential collateralized mortgage obligations		154,576		(9,107	)		68,889		(3,353	)		223,465		(12,460	)
Asset-backed securities		-		-			4,205		(56	)		4,205		(56	)
Corporate securities		38,415		(123	)		50,693		(486	)		89,108		(609	)
Other securities		-		-			1,850		(150	)		1,850		(150	)
Total	$	444,607	$	(10,718	)	$	139,136	$	(4,189	)	$	583,743	$	(14,907	)

	Investment Securities Held to Maturity At March 31, 2014
	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
Securities of U.S. Government sponsored entities	$	1,424	$	(4	)	$	-	$	-		$	1,424	$	(4	)
Residential mortgage-backed securities		29,321		(276	)		7,235		(112	)		36,556		(388	)
Obligations of states and political subdivisions		201,958		(3,292	)		150,776		(8,117	)		352,734		(11,409	)
Residential collateralized mortgage obligations		202,785		(4,572	)		1,655		(20	)		204,440		(4,592	)
Total	$	435,488	$	(8,144	)	$	159,666	$	(8,249	)	$	595,154	$	(16,393	)

	Investment Securities Available for Sale At December 31, 2013
	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
U.S. Treasury securities	$	2,994	$	(3	)	$	-	$	-		$	2,994	$	(3	)
Securities of U.S. Government sponsored entities		91,669		(663	)		-		-			91,669		(663	)
Residential mortgage-backed securities		864		(15	)		-		-			864		(15	)
Commercial mortgage-backed securities		1,072		(5	)		-		-			1,072		(5	)
Obligations of states and political subdivisions		17,516		(222	)		3,214		(101	)		20,730		(323	)
Residential collateralized mortgage obligations		187,848		(12,326	)		40,575		(2,398	)		228,423		(14,724	)
Asset-backed securities		5,002		(1	)		4,475		(100	)		9,477		(101	)
Corporate securities		117,751		(1,087	)		9,824		(177	)		127,575		(1,264	)
Other securities		-		-			1,842		(158	)		1,842		(158	)
Total	$	424,716	$	(14,322	)	$	59,930	$	(2,934	)	$	484,646	$	(17,256	)

	Investment Securities Held to Maturity At December 31, 2013
	Less than 12 months					12 months or longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
Securities of U.S. Government sponsored entities	$	1,597	$	(4	)	$	-	$	-		$	1,597	$	(4	)
Residential mortgage-backed securities		38,396		(616	)		392		(8	)		38,788		(624	)
Obligations of states and political subdivisions		355,797		(14,893	)		64,427		(6,774	)		420,224		(21,667	)
Residential collateralized mortgage obligations		214,981		(5,175	)		14,120		(427	)		229,101		(5,602	)
Total	$	610,771	$	(20,688	)	$	78,939	$	(7,209	)	$	689,710	$	(27,897	)

Interest Income From Investments [Table Text Block]

	For the Three Months Ended March 31,
	2014		2013
	(In thousands)
Taxable:
Mortgage related securities	$	3,053	$	3,561
Other		2,630		1,974
Total taxable		5,683		5,535
Tax-exempt		6,980		7,531
Total interest income from investment securities	$	12,663	$	13,066