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INVESTMENT SECURITIES (Tables)

6 Months Ended

Jun. 30, 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)
June 30, 2013
Available for Sale
Debt securities:
U.S. Government sponsored entities		$	157,342		$	1,223		$	—		$	158,565
States and political subdivisions		190,511			608			(10,799		)	180,320
Corporations		124,584			880			(2,851		)	122,613
Mortgage-backed securities:
U.S. Government sponsored entities		987,252			7,244			(10,675		)	983,821
Non-agency collateralized mortgage obligations		70,052			—			(5,319		)	64,733
Other		745			64			—			809
Total		$	1,530,486		$	10,019		$	(29,644	)	$	1,510,861

Held to Maturity
Mortgage-backed securities - U.S. Government sponsored entities		$	254,981		$	—		$	(9,531	)	$	245,450

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

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

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

		June 30, 2013
		Amortized Cost			Estimated Fair Value
		(Dollars in thousands)
Available for Sale
Due in one year or less		$	100,261		$	100,834
Due after one year through five years		136,506			137,645
Due after five years through ten years		93,974			90,085
Due after ten years		141,696			132,934
Mortage-backed securities		1,057,304			1,048,554
Other		745			809
Total		$	1,530,486		$	1,510,861

Held to Maturity
Mortage-backed securities		$	254,981		$	245,450

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 June 30, 2013:
Debt securities:
States and political subdivisions		$	169,269		$	(10,799	)	$	—		$	—		$	169,269		$	(10,799	)
Corporations		87,203			(2,851		)	—			—			87,203			(2,851		)
Mortgage-backed securities:
U.S. Government sponsored entities		685,319			(20,206		)	—			—			685,319			(20,206		)
Non-agency collateralized mortgage obligations		64,733			(5,319		)	—			—			64,733			(5,319		)
Total temporarily impaired securities		$	1,006,524		$	(39,175	)	$	—		$	—		$	1,006,524		$	(39,175	)

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