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Note 6 - Debt and Equity Securities (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Trading Securities [Table Text Block]

		Amortized Cost				Fair Value				Gross Unrealized Gains				Gross Unrealized Losses
		(In thousands)
Securites held-to-maturity:
Municipals		$	6,180			$	6,180			$	-			$	-
Total		$	6,180			$	6,180			$	-			$	-

		Amortized Cost				Fair Value				Gross Unrealized Gains				Gross Unrealized Losses
		(In thousands)
Corporate		$	115,976			$	111,674			$	134			$	4,436
Municipals			127,696				131,583				3,887				-
Mutual funds			21,290				21,290				-				-
Collateralized loan obligations			53,225				52,898				-				327
Other			7,214				7,212				-				2
Total other securities			325,401				324,657				4,021				4,765
REMIC and CMO			469,987				469,936				3,096				3,147
GNMA			11,635				11,798				302				139
FNMA			170,327				170,057				1,492				1,762
FHLMC			16,961				16,949				87				99
Total mortgage-backed securities			668,910				668,740				4,977				5,147
Total securities available for sale		$	994,311			$	993,397			$	8,998			$	9,912

		Amortized Cost				Fair Value				Gross Unrealized Gains				Gross Unrealized Losses
		(In thousands)
Corporate		$	90,719			$	91,273			$	1,268			$	714
Municipals			145,864				148,896				3,093				61
Mutual funds			21,118				21,118				-				-
Other			7,098				7,090				-				8
Total other securities			264,799				268,377				4,361				783
REMIC and CMO			504,207				505,768				6,188				4,627
GNMA			13,862				14,159				421				124
FNMA			169,956				170,367				2,128				1,717
FHLMC			14,505				14,639				142				8
Total mortgage-backed securities			702,530				704,933				8,879				6,476
Total securities available for sale		$	967,329			$	973,310			$	13,240			$	7,259

Investments Classified by Contractual Maturity Date [Table Text Block]

		Amortized Cost				Fair Value
		(In thousands)
Due in one year or less		$	6,140			$	6,140
Due after one year through five years			40				40
Total securities held-to-maturity		$	6,180			$	6,180

		Amortized Cost				Fair Value
		(In thousands)
Due in one year or less		$	5,976			$	6,011
Due after one year through five years			-				-
Due after five years through ten years			76,791				75,406
Due after ten years			221,344				221,950
Total other securities			304,111				303,367
Mutual funds			21,290				21,290
Mortgage-backed securities			668,910				668,740
Total securities available for sale		$	994,311			$	993,397

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

		Total								Less than 12 months								12 months or more
		Fair Value				Unrealized Losses				Fair Value				Unrealized Losses				Fair Value				Unrealized Losses
		(In thousands)
Corporate		$	85,563			$	4,436			$	76,218			$	3,782			$	9,345			$	654
Collateralized loan obligations			52,898				327				52,898				327				-				-
Other			298				2				-				-				298				2
Total other securities			138,759				4,765				129,116				4,109				9,643				656
REMIC and CMO			238,132				3,147				182,010				1,642				56,122				1,505
GNMA			6,977				139				6,977				139				-				-
FNMA			102,225				1,762				75,769				1,043				26,456				719
FHLMC			14,715				99				14,715				99				-				-
Total mortgage-backed  securities			362,049				5,147				279,471				2,923				82,578				2,224
Total securities available for sale		$	500,808			$	9,912			$	408,587			$	7,032			$	92,221			$	2,880

		Total								Less than 12 months								12 months or more
		Fair Value				Unrealized Losses				Fair Value				Unrealized Losses				Fair Value				Unrealized Losses
		(In thousands)
Corporate		$	39,287			$	714			$	9,573			$	428			$	29,714			$	286
Municipals			8,810				61				3,546				11				5,264				50
Other			292				8				-				-				292				8
Total other securities			48,389				783				13,119				439				35,270				344
REMIC and CMO			216,190				4,627				77,382				399				138,808				4,228
GNMA			8,358				124				-				-				8,358				124
FNMA			95,148				1,717				-				-				95,148				1,717
FHLMC			6,773				8				6,773				8				-				-
Total mortgage-backed  securities			326,469				6,476				84,155				407				242,314				6,069
Total securities available for sale		$	374,858			$	7,259			$	97,274			$	846			$	277,584			$	6,413

Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block]

		For the years ended December 31,
		2015				2014				2013
		(In thousands)
Beginning balance		$	-			$	3,738			$	6,178
Recognition of actual losses			-				-				(842	)
OTTI charges due to credit loss recorded in earnings			-				-				1,419
Securities sold during the period			-				(3,738	)			(3,017	)
Ending balance		$	-			$	-			$	3,738

Schedule of Realized Gain (Loss) [Table Text Block]

		For the years ended December 31,
		2015				2014				2013
		(In thousands)
Gross gains from the sale of securities		$	2,899			$	5,247			$	5,222
Gross losses from the sale of securities			(2,732	)			(2,372	)			(2,201	)
Net gains from the sale of securities		$	167			$	2,875			$	3,021

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