Investment Securities (Tables)

12 Months Ended

Dec. 31, 2011

Investment Securities [Abstract]

Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses, And Fair Values Of Investment Securities

	At 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

	At December 31, 2010
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(In thousands)
Securities Held-to-Maturity
U.S. government sponsored entities	$	99,921	$	2,639	$	—	$	102,560
State and municipal securities		130,107		—		8,946		121,161
Mortgage-backed securities		600,107		5,230		1,653		603,684
Corporate debt securities		9,967		—		13		9,954
Total securities held-to-maturity	$	840,102	$	7,869	$	10,612	$	837,359
Securities Available-for-Sale
U.S. treasury securities	$	125,573	$	—	$	6,745	$	118,828
U.S. government sponsored entities		830,269		1,653		6,840		825,082
State and municipal securities		1,875		—		157		1,718
Mortgage-backed securities		627,574		14,854		123		642,305
Collateralized mortgage obligations		24,719		590		115		25,194
Asset-backed securities		245		—		5		240
Corporate debt securities		374,489		1,374		6,438		369,425
Mutual funds		4,000		—		73		3,927
Preferred stock of government sponsored entities		569		150		—		719
Trust preferred securities		14,549		58		170		14,437
Other equity securities		1,468		224		—		1,692
Total securities available-for-sale	$	2,005,330	$	18,903	$	20,666	$	2,003,567
Total investment securities	$	2,845,432	$	26,772	$	31,278	$	2,840,926

Amortized Cost And Fair Value Of Investment Securities By Contractual Maturities

	Securities Available-for-Sale				Securities Held-to-Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	17,983	$	17,915	$	99,966	$	101,372
Due after one year through five years		125,416		123,651		—		—
Due after five years through ten years		858,217		835,179		29,709		30,943
Due after ten years (1)		307,905		317,733		1,023,829		1,071,662
Total	$	1,309,521	$	1,294,478	$	1,153,504	$	1,203,977

(1) Equity securities are reported in this category

Fair Value, Unrealized Losses, And Number Of Issuances Of The Temporarily Impaired Securities

	As of December 31, 2011
	Temporarily Impaired Securities
	Less than 12 months						12 months or longer						Total
	Fair Value		Unrealized Losses		No. of Issuances		Fair Value		Unrealized Losses		No. of Issuances		Fair Value		Unrealized Losses		No. of Issuances
	(Dollars in thousands)
Securities Held-to-Maturity
Corporate debt securities	$	9,635	$	337		1	$	—	$	—		—	$	9,635	$	337		1
Total securities held-to- maturity	$	9,635	$	337		1	$	—	$	—		—	$	9,635	$	337		1
Securities Available-for-Sale
U.S. government sponsored entities	$	49,993	$	7		1	$	—	$	—		—	$	49,993	$	7		1
Mortgage-backed securities		564		4		8		35		1		2		599		5		10
Mortgage-backed securities-Non- agency		—		—		—		6,719		431		2		6,719		431		2
Collateralized mortgage obligations		—		—		—		570		238		4		570		238		4
Asset-backed securities		—		—		—		166		6		1		166		6		1
Corporate debt securities		185,577		14,201		17		172,857		17,528		19		358,434		31,729		36
Mutual funds		1,987		13		1		—		—		—		1,987		13		1
Trust preferred securities		5,674		24		2		—		—		—		5,674		24		2
Total securities available- for-sale	$	243,795	$	14,249		29	$	180,347	$	18,204		28	$	424,142	$	32,453		57
Total investment securities	$	253,430	$	14,586		30	$	180,347	$	18,204		28	$	433,777	$	32,790		58

	As of December 31, 2010
	Temporarily Impaired Securities
	Less than 12 months						12 months or longer						Total
	Fair Value		Unrealized Losses		No. of Issuances		Fair Value		Unrealized Losses		No. of Issuances		Fair Value		Unrealized Losses		No. of Issuances
	(Dollars in thousands)
Securities Held-to-Maturity
State and municipal securities	$	121,161	$	8,946		122		—		—		—	$	121,161	$	8,946		122
Mortgage-backed securities		89,439		1,653		2		—		—		—		89,439		1,653		2
Corporate debt securities		9,954		13		1		—		—		—		9,954		13		1
Total securities held-to- maturity	$	220,554	$	10,612		125	$	—	$	—		—	$	220,554	$	10,612		125
Securities Available-for-Sale
U.S. Treasury securities	$	118,828	$	6,745		5	$	—	$	—		—	$	118,828	$	6,745		5
U.S. government sponsored entities		578,118		6,840		12		—		—		—		578,118		6,840		12
State and municipal securities		1,718		157		2		—		—		—		1,718		157		2
Mortgage-backed securities		354		4		7		32		1		1		386		5		8
Mortgage-backed securities-Non- agency		—		—		—		10,127		118		3		10,127		118		3
Collateralized mortgage obligations		—		—		—		887		115		4		887		115		4
Asset-backed securities		—		—		—		240		5		1		240		5		1
Corporate debt securities		310,630		6,438		30		—		—		—		310,630		6,438		30
Mutual funds		3,927		73		1		—		—		—		3,927		73		1
Trust preferred securities		10,384		170		2		—		—		—		10,384		170		2
Total securities available- for-sale	$	1,023,959	$	20,427		59	$	11,286	$	239		9	$	1,035,245	$	20,666		68
Total investment securities	$	1,244,513	$	31,039		184	$	11,286	$	239		9	$	1,255,799	$	31,278		193