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INVESTMENT SECURITIES (Tables)

3 Months Ended

Mar. 31, 2013

INVESTMENT SECURITIES

Summary of available for sale and held to maturity investment securities

					Gross			Gross			Estimated
		Amortized			unrealized			unrealized			fair
		cost			gains			losses			value
		(Dollars in thousands)
March 31, 2013
Available for Sale
U.S. Government sponsored entities debt securities		$	207,755		$	2,343		$	—		$	210,098
States and political subdivisions debt securities		193,648			2,022			(2,044		)	193,626
U.S. Government sponsored entities mortgage-backed securities		981,911			15,876			(2,781		)	995,006
Corporate securities		125,117			2,479			(61		)	127,535
Non-agency collateralized mortgage obligations		9,965			19			—			9,984
Other		751			65			—			816
Total		$	1,519,147		$	22,804		$	(4,886	)	$	1,537,065

Held to Maturity
U.S. Government sponsored entities mortgage-backed securities		$	159,363		$	452		$	(332	)	$	159,483

December 31, 2012
Available for Sale
U.S. Government sponsored entities debt securities		$	278,198		$	2,741		$	—		$	280,939
States and political subdivisions debt securities		184,274			2,831			(1,194		)	185,911
U.S. Government sponsored entities mortgage-backed securities		925,018			17,548			(1,523		)	941,043
Corporate securities		125,649			2,360			(63		)	127,946
Other		866			40			—			906
Total		$	1,514,005		$	25,520		$	(2,780	)	$	1,536,745

Held to Maturity
U.S. Government sponsored entities mortgage-backed securities		$	161,848		$	695		$	(15	)	$	162,528

Schedule of amortized cost and estimated fair value of investment securities by contractual maturity

		March 31, 2013
		Amortized Cost			Estimated Fair Value
		(Dollars in thousands)
Available for Sale
Due in one year or less		$	110,289		$	110,667
Due after one year through five years		176,722			181,273
Due after five years through ten years		96,482			96,745
Due after ten years		143,027			142,574
Mortage-backed securities		991,876			1,004,990
Other		751			816
Total		$	1,519,147		$	1,537,065

Held to Maturity
Mortage-backed securities		$	159,363		$	159,483

Schedule of investment securities in an unrealized loss position

		Less than 12 months						12 months or longer						Total
					Unrealized						Unrealized						Unrealized
Description of Securities		Fair Value			Losses			Fair Value			Losses			Fair Value			Losses
		(Dollars in thousands)
At March 31, 2013:
States and political subdivisions debt securities		$	106,117		$	(2,044	)	$	—		$	—		$	106,117		$	(2,044	)
U.S. Government sponsored entities mortgage-backed securities		212,650			(3,113		)	—			—			212,650			(3,113		)
Corporate securities		23,516			(61		)	—			—			23,516			(61		)
Total temporarily impaired securities		$	342,283		$	(5,218	)	$	—		$	—		$	342,283		$	(5,218	)

At December 31, 2012:
States and political subdivisions		$	73,128		$	(1,194	)	$	—		$	—		$	73,128		$	(1,194	)
U.S. Government sponsored entities mortgage-backed securities		206,981			(1,538		)	—			—			206,981			(1,538		)
Corporate securities		23,205			(63		)							23,205			(63		)
Total temporarily impaired securities		$	303,314		$	(2,795	)	$	—		$	—		$	303,314		$	(2,795	)