Investment Securities (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2012

Dec. 31, 2011

Investment Securities [Abstract]

Schedule Of Investment Securities

(in thousands)
Securities Available-for-Sale	Amortized Cost	Gross Unrealized Holding Gains	Gross Unrealized Holding Losses	Estimated Fair Value
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$599,125	$478	$2,128	$597,475
Obligations of states and political subdivisions	2,616	39	-	2,655
U.S. Government sponsored entities asset-backed securities	388,444	16,734	-	405,178
Other equity securities	1,188	1,014	29	2,173
Total	$991,373	$18,265	$2,157	$1,007,481

Securities Held-to-Maturity	Amortized Cost	Gross Unrecognized Holding Gains	Gross Unrecognized Holding Losses	Estimated Fair Value
Obligations of states and political subdivisions	$1,427	$3	$-	$1,430
U.S. Government sponsored entities asset-backed securities	780,823	13,102	280	793,645
Total	$782,250	$13,105	$280	$795,075

(in thousands)
Securities Available-for-Sale	Amortized cost	Gross unrealized holding gains	Gross unrealized holding losses	Estimated fair value
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$370,043	$1,614	$-	$371,657
Obligations of states and political subdivisions	2,616	44	-	2,660
U.S. Government sponsored entities asset-backed securities	427,300	16,995	-	444,295
Other equity securities	1,188	877	32	2,033
Total	$801,147	$19,530	$32	$820,645
Securities Held-to-Maturity	Amortized cost	Gross unrecognized holding gains	Gross unrecognized holding losses	Estimated fair value
Obligations of states and political subdivisions	$1,992	$5	$-	$1,997
U.S. Government sponsored entities asset-backed securities	818,232	14,377	32	832,577
Total	$820,224	$14,382	$32	$834,574

(in thousands)
Securities Available-for-Sale	Amortized cost	Gross unrealized holding gains	Gross unrealized holding losses	Estimated fair value
Obligations of U.S. Treasury and other U.S. Government sponsored entities	$370,043	$1,614	$-	$371,657
Obligations of states and political subdivisions	2,616	44	-	2,660
U.S. Government sponsored entities asset-backed securities	427,300	16,995	-	444,295
Other equity securities	1,188	877	32	2,033
Total	$801,147	$19,530	$32	$820,645
Securities Held-to-Maturity	Amortized cost	Gross unrecognized holding gains	Gross unrecognized holding losses	Estimated fair value
Obligations of states and political subdivisions	$1,992	$5	$-	$1,997
U.S. Government sponsored entities asset-backed securities	818,232	14,377	32	832,577
Total	$820,224	$14,382	$32	$834,574

Schedule Of Unrealized Loss On Securities

(in thousands)	Less than 12 months		12 months or longer		Total
Securities Available-for-Sale	Fair value	Unrealized losses	Fair value	Unrealized losses	Fair value	Unrealized losses
Obligations of U.S. Treasury and other U.S. Government agencies	$ 347,872	$2,128	$-	$-	$347,872	$2,128
Other equity securities	-	-	74	29	74	29
Total	$347,872	$2,128	$74	$29	$347,946	$2,157
Securities Held-to-Maturity
U.S. Government sponsored entities asset-backed securities	$ 62,420	$280	$-	$-	$62,420	$280

(in thousands)	Less than 12 months		12 months or longer		Total
Securities Available-for-Sale	Fair value	Unrealized losses	Fair value	Unrealized losses	Fair value	Unrealized losses
Other equity securities	$-	$-	$80	$32	$80	$32
Securities Held-to-Maturity
U.S. Government sponsored entities asset-backed securities	$-	$-	$38,775	$32	$38,775	$32

Amortized Cost And Estimated Fair Value Of Investments In Debt Securities By Contractual Maturity

(in thousands)	Amortized cost	Fair value
Securities Available-for-Sale
U.S. Treasury and sponsored entities notes:
Due within one year	$249,125	$249,604
Due one through five years	275,000	273,532
Due five through ten years	75,000	74,339
Total	$599,125	$597,475
Obligations of states and political subdivisions:
Due within one year	$2,121	$2,130
Due one through five years	495	525
	$2,616	$2,655
U.S. Government sponsored entities asset-backed securities:
Total	$388,444	$405,178

(in thousands)	Amortized cost	Fair value
Securities Held-to-Maturity
Obligations of state and political subdivisions:
Due within one year	$1,427	$1,430
Total	$1,427	$1,430
U.S. Government sponsored entities asset-backed securities:
Total	$780,823	$793,645