Note 6 - Investment Securities (Tables)

9 Months Ended

Sep. 30, 2012

	September 30, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Securities Held-to-Maturity
State and municipal securities	$	129,173	$	9,392	$	-	$	138,565
Mortgage-backed securities		710,230		49,366		-		759,596
Corporate debt securities		9,973		-		67		9,906
Total securities held-to-maturity	$	849,376	$	58,758	$	67	$	908,067
Securities Available-for-Sale
U.S. treasury securities	$	309,746	$	177	$	3	$	309,920
U.S. government sponsored entities		50,000		103		-		50,103
Mortgage-backed securities		544,579		22,176		4		566,751
Collateralized mortgage obligations		11,329		496		44		11,781
Asset-backed securities		151		-		5		146
Corporate debt securities		357,873		-		20,324		337,549
Mutual funds		6,000		149		-		6,149
Preferred stock of government sponsored entities		569		318		-		887
Trust preferred securities		9,965		320		-		10,285
Total securities available-for-sale	$	1,290,212	$	23,739	$	20,380	$	1,293,571
Total investment securities	$	2,139,588	$	82,497	$	20,447	$	2,201,638

	December 31, 2011
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Securities Held-to-Maturity
U.S. government sponsored entities	$	99,966	$	1,406	$	-	$	101,372
State and municipal securities		129,577		7,053		-		136,630
Mortgage-backed securities		913,990		42,351		-		956,341
Corporate debt securities		9,971		-		337		9,634
Total securities held-to-maturity	$	1,153,504	$	50,810	$	337	$	1,203,977
Securities Available-for-Sale
U.S. government sponsored entities	$	500,007	$	1,226	$	7	$	501,226
State and municipal securities		1,869		59		-		1,928
Mortgage-backed securities		325,706		12,361		436		337,631
Collateralized mortgage obligations		16,184		540		238		16,486
Asset-backed securities		172		-		6		166
Corporate debt securities		412,045		113		31,729		380,429
Mutual funds		6,000		48		13		6,035
Preferred stock of government sponsored entities		569		1,085		-		1,654
Trust preferred securities		45,501		486		24		45,963
Other equity securities		1,468		1,492		-		2,960
Total securities available-for-sale	$	1,309,521	$	17,410	$	32,453	$	1,294,478
Total investment securities	$	2,463,025	$	68,220	$	32,790	$	2,498,455

	Securities available-for-sale				Securities held-to-maturity
	Amortized cost		Fair value		Amortized cost		Fair value
	(In thousands)
Due in one year or less	$	157,806	$	157,804	$	-	$	-
Due after one year through five years		385,083		378,412		-		-
Due after five years through ten years		241,904		233,331		57,554		61,206
Due after ten years (1)		505,419		524,024		791,822		846,861
Total	$	1,290,212	$	1,293,571	$	849,376	$	908,067

	As of September 30, 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
Corporate debt securities	$	9,906	$	67	$	-	$	-	$	9,906	$	67
Total securities held-to-maturity	$	9,906	$	67	$	-	$	-	$	9,906	$	67
Securities Available-for-Sale
U.S. treasury securities	$	49,943	$	3	$	-	$	-	$	49,943	$	3
Mortgage-backed securities		9		1		168		1		177		2
Mortgage-backed securities-Non-agency		-		-		96		2		96		2
Collateralized mortgage obligations		-		-		519		44		519		44
Asset-backed securities		-		-		146		5		146		5
Corporate debt securities		62,266		2,707		267,383		17,617		329,649		20,324
Total securities available-for-sale	$	112,218	$	2,711	$	268,312	$	17,669	$	380,530	$	20,380
Total investment securities	$	122,124	$	2,778	$	268,312	$	17,669	$	390,436	$	20,447

	As of December 31, 2011
	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
Corporate debt securities	$	9,635	$	337	$	-	$	-	$	9,635	$	337
Total securities held-to-maturity	$	9,635	$	337	$	-	$	-	$	9,635	$	337
Securities Available-for-Sale
U.S. government sponsored entities	$	49,993	$	7	$	-	$	-	$	49,993	$	7
Mortgage-backed securities		564		4		35		1		599		5
Mortgage-backed securities-Non-agency		-		-		6,719		431		6,719		431
Collateralized mortgage obligations		-		-		570		238		570		238
Asset-backed securities		-		-		166		6		166		6
Corporate debt securities		185,577		14,201		172,857		17,528		358,434		31,729
Mutual funds		1,987		13		-		-		1,987		13
Trust preferred securities		5,674		24		-		-		5,674		24
Total securities available-for-sale	$	243,795	$	14,249	$	180,347	$	18,204	$	424,142	$	32,453
Total investment securities	$	253,430	$	14,586	$	180,347	$	18,204	$	433,777	$	32,790