Investment Securities (Tables)

3 Months Ended

Mar. 31, 2012

Investment Securities [Abstract]

Amortized Cost, Gross Unrealized Gains And Losses And Fair Value Of Securities Held To Maturity

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
March 31, 2012
U.S. Treasury securities	$	99,982	$	10,582	$	—		$	110,564
Obligations of states and political subdivisions		442,551		17,734		(154	)		460,131
Residential mortgage-backed securities		1,090,434		42,904		(121	)		1,133,217
Trust preferred securities		193,298		4,555		(17,332	)		180,521
Corporate and other debt securities		52,197		4,009		(195	)		56,011
Total investment securities held to maturity	$	1,878,462	$	79,784	$	(17,802	)	$	1,940,444
December 31, 2011
U.S. Treasury securities	$	100,018	$	13,841	$	—		$	113,859
Obligations of states and political subdivisions		433,284		19,931		(14	)		453,201
Residential mortgage-backed securities		1,180,104		51,041		(152	)		1,230,993
Trust preferred securities		193,312		4,308		(22,867	)		174,753
Corporate and other debt securities		52,198		3,799		(1,606	)		54,391
Total investment securities held to maturity	$	1,958,916	$	92,920	$	(24,639	)	$	2,027,197

Age Of Unrealized Losses And Fair Value Of Related Securities Held To Maturity

	Less than Twelve Months					More than Twelve Months					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(in thousands)
March 31, 2012
Obligations of states and political subdivisions	$	4,601	$	(154	)	$	—	$	—		$	4,601	$	(154	)
Residential mortgage-backed securities		90,445		(121	)		—		—			90,445		(121	)
Trust preferred securities		21,176		(352	)		60,771		(16,980	)		81,947		(17,332	)
Corporate and other debt securities		6,907		(57	)		16,826		(138	)		23,733		(195	)
Total	$	123,129	$	(684	)	$	77,597	$	(17,118	)	$	200,726	$	(17,802	)
December 31, 2011
Obligations of states and political subdivisions	$	1,854	$	(13	)	$	50	$	(1	)	$	1,904	$	(14	)
Residential mortgage-backed securities		33,520		(152	)		—		—			33,520		(152	)
Trust preferred securities		35,527		(730	)		55,612		(22,137	)		91,139		(22,867	)
Corporate and other debt securities		14,756		(192	)		7,560		(1,414	)		22,316		(1,606	)
Total	$	85,657	$	(1,087	)	$	63,222	$	(23,552	)	$	148,879	$	(24,639	)

Contractual Maturities Of Debt Securities Held To Maturity

	March 31, 2012
	Amortized Cost		Fair Value
	(in thousands)
Due in one year	$	115,691	$	115,855
Due after one year through five years		44,549		46,074
Due after five years through ten years		225,299		244,791
Due after ten years		402,489		400,507
Residential mortgage-backed securities		1,090,434		1,133,217
Total investment securities held to maturity	$	1,878,462	$	1,940,444

Amortized Cost, Gross Unrealized Gains And Losses And Fair Value Of Securities Available For Sale

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
March 31, 2012
U.S. Treasury securities	$	49,013	$	26	$	—		$	49,039
U.S. government agency securities		106,708		1,229		(91	)		107,846
Obligations of states and political subdivisions		18,600		1,143		(58	)		19,685
Residential mortgage-backed securities		476,729		11,280		(5,080	)		482,929
Trust preferred securities*		86,935		177		(21,696	)		65,416
Corporate and other debt securities		57,625		4,504		(4,181	)		57,948
Equity securities		50,306		679		(2,874	)		48,111
Total investment securities available for sale	$	845,916	$	19,038	$	(33,980	)	$	830,974
December 31, 2011
U.S. government agency securities	$	89,787	$	1,204	$	(243	)	$	90,748
Obligations of states and political subdivisions		18,893		1,322		(1	)		20,214
Residential mortgage-backed securities		304,631		10,950		(5,444	)		310,137
Trust preferred securities*		96,956		78		(33,176	)		63,858
Corporate and other debt securities		40,638		2,554		(3,582	)		39,610
Equity securities		47,932		1,320		(7,299	)		41,953
Total investment securities available for sale	$	598,837	$	17,428	$	(49,745	)	$	566,520

* Includes three pooled trust preferred securities, principally collateralized by securities issued by banks and insurance companies.

Age Of Unrealized Losses And Fair Value Of Related Securities

	Less than					More than
	Twelve Months					Twelve Months					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(in thousands)
March 31, 2012
U.S. government agency securities	$	24,060	$	(79	)	$	7,839	$	(12	)	$	31,899	$	(91	)
Obligations of states and political subdivisions		11,113		(58	)		—		—			11,113		(58	)
Residential mortgage-backed securities		54,778		(1,879	)		21,711		(3,201	)		76,489		(5,080	)
Trust preferred securities		3,298		(356	)		48,930		(21,340	)		52,228		(21,696	)
Corporate and other debt securities		3,091		(330	)		6,125		(3,851	)		9,216		(4,181	)
Equity securities		285		(401	)		12,986		(2,473	)		13,271		(2,874	)
Total	$	96,625	$	(3,103	)	$	97,591	$	(30,877	)	$	194,216	$	(33,980	)
December 31, 2011
U.S. government agency securities	$	7,980	$	(243	)	$	—	$	—		$	7,980	$	(243	)
Obligations of states and political subdivisions		141		(1	)		—		—			141		(1	)
Residential mortgage-backed securities		41,673		(1,655	)		22,639		(3,789	)		64,312		(5,444	)
Trust preferred securities		23,962		(1,061	)		38,191		(32,115	)		62,153		(33,176	)
Corporate and other debt securities		3,243		(173	)		6,567		(3,409	)		9,810		(3,582	)
Equity securities		20,570		(4,430	)		12,551		(2,869	)		33,121		(7,299	)
Total	$	97,569	$	(7,563	)	$	79,948	$	(42,182	)	$	177,517	$	(49,745	)

Contractual Maturities Of Investments Securities Available For Sale

	March 31, 2012
	Amortized Cost		Fair Value
	(in thousands)
Due in one year	$	453	$	454
Due after one year through five years		20,952		21,526
Due after five years through ten years		155,886		159,442
Due after ten years		141,590		118,512
Residential mortgage-backed securities		476,729		482,929
Equity securities		50,306		48,111
Total investment securities available for sale	$	845,916	$	830,974

Realized Gains And Losses On Sales Of Investment Securities

	Three Months Ended
	March 31,
	2012			2011
	(in thousands)
Sales transactions:
Gross gains	$	140		$	2,674
Gross losses		(298	)		—
		(158	)		2,674
Maturities and other securities transactions:
Gross gains		13			10
Gross losses		(12	)		(5	)
		1			5
Total (losses) gains on securities transactions, net	$	(157	)	$	2,679

Changes In The Credit Loss Component Of Cumulative Other-Than-Temporary Impairment Losses On Debt Securities

	Three Months Ended
	March 31,
	2012			2011
	(in thousands)
Balance, beginning of period	$	29,070		$	10,500
Additions:
Initial credit impairments		—			—
Subsequent credit impairments		—			825
Reductions:
Accretion of credit loss impairment due to an increase in expected cash flows		(303	)		(156	)
Balance, end of period	$	28,767		$	11,169