Note 6 - Debt and Equity Securities (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Trading Securities [Table Text Block]

					Gross		Gross
	Amortized				Unrealized		Unrealized
	Cost		Fair Value		Gains		Losses
	(In thousands)
Securites held-to-maturity:
Municipals	$	37,735	$	35,408	$	-	$	2,327
Total	$	37,735	$	35,408	$	-	$	2,327

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

					Gross		Gross
	Amortized				Unrealized		Unrealized
	Cost		Fair Value		Gains		Losses
	(In thousands)
Corporate	$	110,000	$	102,910	$	-	$	7,090
Municipals		124,984		126,903		1,983		64
Mutual funds		21,366		21,366		-		-
Collateralized loan obligations		85,470		86,365		895		-
Other		7,363		7,361		-		2
Total other securities		349,183		344,905		2,878		7,156
REMIC and CMO		402,636		401,370		1,607		2,873
GNMA		1,319		1,427		108		-
FNMA		109,493		108,351		463		1,605
FHLMC		5,378		5,328		35		85
Total mortgage-backed securities		518,826		516,476		2,213		4,563
Total securities available for sale	$	868,009	$	861,381	$	5,091	$	11,719

					Gross		Gross
	Amortized				Unrealized		Unrealized
	Cost		Fair Value		Gains		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

Investments Classified by Contractual Maturity Date [Table Text Block]

	Amortized
	Cost		Fair Value
	(In thousands)
Due in one year or less	$	15,870	$	15,870
Due after ten years		21,865		19,538
Total securities held-to-maturity	$	37,735	$	35,408

	Amortized
	Cost		Fair Value
	(In thousands)
Due in one year or less	$	-	$	-
Due after one year through five years		1,781		1,784
Due after five years through ten years		111,348		108,604
Due after ten years		214,688		213,151
Total other securities		327,817		323,539
Mutual funds		21,366		21,366
Mortgage-backed securities		518,826		516,476
Total securities available for sale	$	868,009	$	861,381

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

			Total				Less than 12 months				12 months or more
					Unrealized				Unrealized				Unrealized
	Count		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	(Dollars in thousands)
Held-to-maturity securities
Municipals		1	$	19,538	$	2,327	$	19,538	$	2,327	$	-	$	-
Total securities held-to-maturity		1	$	19,538	$	2,327	$	19,538	$	2,327	$	-	$	-
Available for sale securities
Corporate		14	$	102,910	$	7,090	$	28,476	$	1,524	$	74,434	$	5,566
Municipals		4		16,047		64		16,047		64		-		-
Other		1		298		2		-		-		298		2
Total other securities		19		119,255		7,156		44,523		1,588		74,732		5,568
REMIC and CMO		35		222,807		2,873		208,827		2,268		13,980		605
FNMA		18		80,924		1,605		74,972		1,250		5,952		355
FHLMC		1		3,993		85		3,993		85		-		-
Total mortgage-backed securities		54		307,724		4,563		287,792		3,603		19,932		960
Total securities available for sale		73	$	426,979	$	11,719	$	332,315	$	5,191	$	94,664	$	6,528

			Total				Less than 12 months				12 months or more
					Unrealized				Unrealized				Unrealized
	Count		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	(Dollars in thousands)
Corporate		12	$	85,563	$	4,436	$	76,218	$	3,782	$	9,345	$	654
Municipals		7		52,898		327		52,898		327		-		-
Other		1		298		2		-		-		298		2
Total other securities		20		138,759		4,765		129,116		4,109		9,643		656
REMIC and CMO		33		238,132		3,147		182,010		1,642		56,122		1,505
GNMA		1		6,977		139		6,977		139		-		-
FNMA		20		102,225		1,762		75,769		1,043		26,456		719
FHLMC		3		14,715		99		14,715		99		-		-
Total mortgage-backed  securities		57		362,049		5,147		279,471		2,923		82,578		2,224
Total securities available for sale		77	$	500,808	$	9,912	$	408,587	$	7,032	$	92,221	$	2,880

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

	For the years ended December 31,
	2016		2015		2014
	(In thousands)
Beginning balance	$	-	$	-	$	3,738
Recognition of actual losses		-		-		-
OTTI charges due to credit loss recorded in earnings		-		-		-
Securities sold during the period		-		-		(3,738	)
Ending balance	$	-	$	-	$	-

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

	For the years ended
	December 31,
	2016			2015			2014
	(In thousands)
Gross gains from the sale of securities	$	2,370		$	2,899		$	5,247
Gross losses from the sale of securities		(846	)		(2,732	)		(2,372	)
Net gains from the sale of securities	$	1,524		$	167		$	2,875