Note 6 - Investment Securities (Tables)

3 Months Ended

Mar. 31, 2013

	March 31, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Securities Available-for-Sale
U.S. treasury securities	$	359,880	$	234	$	-	$	360,114
State and municipal securities		59,805		3,653		-		63,458
Mortgage-backed securities		1,449,816		42,335		1,553		1,490,598
Collateralized mortgage obligations		8,631		369		54		8,946
Asset-backed securities		136		-		4		132
Corporate debt securities		264,949		657		9,149		256,457
Mutual funds		6,000		48		13		6,035
Preferred stock of government sponsored entities		569		3,987		-		4,556
Total securities available-for-sale	$	2,149,786	$	51,283	$	10,773	$	2,190,296
Total investment securities	$	2,149,786	$	51,283	$	10,773	$	2,190,296

	December 31, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Securities Held-to-Maturity
State and municipal securities	$	129,037	$	9,268	$	-	$	138,305
Mortgage-backed securities		634,757		40,801		-		675,558
Corporate debt securities		9,974		69		-		10,043
Total securities held-to-maturity	$	773,768	$	50,138	$	-	$	823,906
Securities Available-for-Sale
U.S. treasury securities	$	509,748	$	228	$	5	$	509,971
Mortgage-backed securities		404,505		12,194		5		416,694
Collateralized mortgage obligations		9,772		430		34		10,168
Asset-backed securities		145		-		4		141
Corporate debt securities		349,973		106		14,102		335,977
Mutual funds		6,000		79		-		6,079
Preferred stock of government sponsored entities		569		1,766		-		2,335
Trust preferred securities		9,964		151		-		10,115
Total securities available-for-sale	$	1,290,676	$	14,954	$	14,150	$	1,291,480
Total investment securities	$	2,064,444	$	65,092	$	14,150	$	2,115,386

	Securities available-for-sale
	Amortized cost		Fair value
	(In thousands)
Due in one year or less	$	299,974	$	300,139
Due after one year through five years		186,517		184,546
Due after five years through ten years		222,033		221,132
Due after ten years (1)		1,441,262		1,484,479
Total	$	2,149,786	$	2,190,296

	March 31, 2013
	Temporarily impaired securities
	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(Dollars in thousands)
Securities Available-for-Sale
Mortgage-backed securities	$	321,604	$	1,551	$	163	$	1	$	321,767	$	1,552
Mortgage-backed securities-Non-agency		-		-		96		1		96		1
Collateralized mortgage obligations		-		-		417		54		417		54
Asset-backed securities		-		-		132		4		132		4
Corporate debt securities		9,855		145		195,996		9,004		205,851		9,149
Mutual funds		1,987		13		-		-		1,987		13
Total securities available-for-sale	$	333,446	$	1,709	$	196,804	$	9,064	$	530,250	$	10,773
Total investment securities	$	333,446	$	1,709	$	196,804	$	9,064	$	530,250	$	10,773

	December 31, 2012
	Temporarily Impaired Securities
	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(Dollars in thousands)
Securities Held-to-Maturity
Total securities held-to-maturity	$	-	$	-	$	-	$	-	$	-	$	-
Securities Available-for-Sale
U.S. treasury securities	$	49,969	$	5	$	-	$	-	$	49,969	$	5
Mortgage-backed securities		231		1		170		1		401		2
Mortgage-backed securities-Non-agency		-		-		96		2		96		2
Collateralized mortgage obligations		-		-		439		35		439		35
Asset-backed securities		-		-		141		4		141		4
Corporate debt securities		52,468		2,532		253,430		11,570		305,898		14,102
Total securities available-for-sale	$	102,668	$	2,538	$	254,276	$	11,612	$	356,944	$	14,150
Total investment securities	$	102,668	$	2,538	$	254,276	$	11,612	$	356,944	$	14,150