Investment Securities (Tables)

6 Months Ended

Jun. 30, 2011

Investment Securities

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

(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
June 30, 2011
Securities available for sale:
U.S. Treasury securities	$	36,047	$	78	$	(7	)	$	36,118
U.S. Government-sponsored enterprise obligations		521,471		3,476		(1,032	)		523,915
Obligations of state and political subdivisions		143,680		2,776		(826	)		145,630
Mortgage backed securities		1,206,899		22,796		(1,656	)		1,228,039
Other securities		3,390		77		—			3,467
Total securities available for sale	$	1,911,487	$	29,196	$	(3,514	)	$	1,937,169
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	180,325	$	2,615	$	—		$	182,940
Obligations of state and political subdivisions		67,324		1,264		(378	)		68,210
Mortgage backed securities		30,543		779		—			31,322
Total securities held to maturity	$	278,192	$	4,658	$	(378	)	$	282,472
December 31, 2010
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	424,180	$	2,414	$	(3,794	)	$	422,800
Obligations of state and political subdivisions		39,896		668		(395	)		40,169
Mortgage backed securities		1,255,624		19,508		(11,263	)		1,263,869
Other securities		2,882		74		—			2,956
Total securities available for sale	$	1,722,582	$	22,664	$	(15,452	)	$	1,729,794
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	180,479	$	2,549	$	(68	)	$	182,960
Obligations of state and political subdivisions		75,768		480		(1,728	)		74,520
Mortgage backed securities		33,773		741		—			34,514
Total securities held to maturity	$	290,020	$	3,770	$	(1,796	)	$	291,994

Schedule Of Securities With Gross Unrealized Losses Aggregated By Investment Category

	Less Than Twelve Months					Over Twelve Months					Total
(dollars in thousands)	Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value
June 30, 2011
Securities available for sale:
U.S. Treasury securities	$	(7	)	$	5,006	$	—		$	—	$	(7	)	$	5,006
U.S. Government-sponsored enterprise obligations		(1,032	)		99,475		—			—		(1,032	)		99,475
Obligations of state and political subdivisions		(826	)		17,821		—			—		(826	)		17,821
Mortgage backed securities		(1,344	)		249,276		(312	)		17,746		(1,656	)		267,022
Total securities available for sale	$	(3,209	)	$	371,578	$	(312	)	$	17,746	$	(3,521	)	$	389,324
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	—		$	—	$	—		$	—	$	—		$	—
Obligations of state and political subdivisions		(274	)		19,907		(104	)		1,225		(378	)		21,132
Mortgage backed securities		—			—		—			—		—			—
Total securities held to maturity	$	(274	)	$	19,907	$	(104	)	$	1,225	$	(378	)	$	21,132
December 31, 2010
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(3,794	)	$	195,785	$	—		$	—	$	(3,794	)	$	195,785
Obligations of state and political subdivisions		(395	)		6,771		—			—		(395	)		6,771
Mortgage backed securities		(10,678	)		528,280		(585	)		20,908		(11,263	)		549,188
Total securities available for sale	$	(14,867	)	$	730,836	$	(585	)	$	20,908	$	(15,452	)	$	751,744
Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	(68	)	$	7,075	$	—		$	—	$	(68	)	$	7,075
Obligations of state and political subdivisions		(1,526	)		36,646		(202	)		1,128		(1,728	)		37,774
Mortgage backed securities		—			—		—			—		—			—
Total securities held to maturity	$	(1,594	)	$	43,721	$	(202	)	$	1,128	$	(1,796	)	$	44,849

Schedule Of Amortized Cost And Estimated Fair Value By Maturity Of Investment Securities

	Securities Available for Sale							Securities Held to Maturity
(dollars in thousands)	Weighted Average Yield			Amortized Cost		Fair Value		Weighted Average Yield			Amortized Cost		Fair Value
Within one year or less		0.50	%	$	71,876	$	72,009		1.30	%	$	10,971	$	11,043
One through five years		1.83			273,929		277,367		2.18			175,682		178,372
After five through ten years		2.79			530,910		540,072		3.28			24,153		24,732
Over ten years		3.04			1,034,772		1,047,721		3.45			67,386		68,325
Totals		2.70	%	$	1,911,487	$	1,937,169		2.54	%	$	278,192	$	282,472

Schedule Of Realized Gains And Losses From The Sale Of Securities Classified As Available For Sale

	Three Months Ended June 30,				Six Months Ended June 30,
(dollars in thousands)	2011		2010		2011		2010
Realized gains	$	1,426	$	60	$	1,427	$	982
Realized losses		—		—		—		—
Net realized gains (losses)	$	1,426	$	60	$	1,427	$	982

Schedule Of Changes In Other Comprehensive Income, Investment Portfolio Activity

	Six Months Ended
(dollars in thousands)	June 30, 2011			June 30, 2010
Balance at beginning of period, net	$	5,310		$	10,376
Unrealized gain (loss) on securities available for sale		19,898			19,698
Reclassification adjustment for net (gains) losses realized in net income		(1,427	)		(982	)
Net unrealized gain (loss)		18,471			18,716
Tax effect		6,465			6,551
Net of tax change		12,006			12,165
Balance at end of period, net	$	17,316		$	22,541