INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2011

The following is a summary of held-to-maturity and available-for-sale investment securities as of December 31, 2011.



	Held-to-Maturity								Available-for-Sale
(Dollars in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Market Value		Amortized Cost		Unrealized Gains		Unrealized Losses			Market Value
Securities of U.S. government agencies and corporations	$	0	$	0	$	0	$	0	$	45,757	$	433	$	0		$	46,190
Mortgage-backed securities	90		2		0		92		1,344,015		21,394		(2,031		)	1,363,378
Obligations of state and other political subdivisions	2,574		227		0		2,801		9,270		121		(5		)	9,386
Other securities	0		0		0		0		22,448		530		(86		)	22,892
Total	$	2,664	$	229	$	0	$	2,893	$	1,421,490	$	22,478	$	(2,122	)	$	1,441,846

The following is a summary of held-to-maturity and available-for-sale investment securities as of December 31, 2010.



	Held-to-Maturity									Available-for-Sale
	Amortized		Unrealized		Unrealized			Market		Amortized		Unrealized		Unrealized			Market
(Dollars in thousands)	Cost		Gains		Losses			Value		Cost		Gains		Losses			Value
U.S. Treasuries	$	13,959	$	390	$	(18	)	$	14,331	$	0	$	0	$	0		$	0
Securities of U.S. government agencies and corporations	0		0		0			0		105,028		957		0			105,985
Mortgage-backed securities	118		4		0			122		775,867		15,513		(2,630		)	788,750
Obligations of state and other political subdivisions	3,329		284		0			3,613		13,708		207		(91		)	13,824
Other securities	0		0		0			0		9,943		614		(6		)	10,551
Total	$	17,406	$	678	$	(18	)	$	18,066	$	904,546	$	17,291	$	(2,727	)	$	919,110

The following is a summary of investment securities by estimated maturity as of December 31, 2011.



	Held-to-Maturity				Available-for-Sale
(Dollars in thousands)	Amortized Cost		Market Value		Amortized Cost		Market Value
Due in one year or less	$	294	$	296	$	38,331	$	38,619
Due after one year through five years	1,329		1,392		836,507		853,883
Due after five years through ten years	197		230		170,743		172,523
Due after ten years	844		975		375,909		376,821
Total	$	2,664	$	2,893	$	1,421,490	$	1,441,846

The following tables present the age of gross unrealized losses and associated fair value by investment category.



	December 31, 2011
	Less than 12 Months				12 Months or More				Total
(Dollars in thousands)	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Mortgage-backed securities	$	343,883	$	1,938	$	29,562	$	93	$	373,445	$	2,031
Obligations of state and other political subdivisions	0		0		2,278		5		2,278		5
Other securities	9,133		86		17		0		9,150		86
Total	$	353,016	$	2,024	$	31,857	$	98	$	384,873	$	2,122



	December 31, 2010
	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(Dollars in thousands)	Value		Loss		Value		Loss		Value		Loss
U.S. Treasuries	$	2,334	$	18	$	0	$	0	$	2,334	$	18
Mortgage-backed securities	280,445		2,538		1,336		92		281,781		2,630
Obligations of state and other political subdivisions	0		0		2,194		91		2,194		91
Other securities	2,217		6		17		0		2,234		6
Total	$	284,996	$	2,562	$	3,547	$	183	$	288,543	$	2,745