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INVESTMENT SECURITIES (Tables)

12 Months Ended

Dec. 31, 2012

INVESTMENT SECURITIES

Summary of investment securities portfolio

					Gross			Gross			Estimated
		Amortized			unrealized			unrealized			fair
		cost			gains			losses			value
		(Dollars in thousands)
2012
Held to Maturity:
U.S. Government sponsored entities mortgage-backed securities		$	161,848		$	695		$	(15	)	$	162,528

Available for Sale:
U.S. Government sponsored entities debt securities		$	278,198		$	2,741		$	—		$	280,939
States and political subdivisions		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

2011
Held to Maturity:
U.S. Government sponsored entities mortgage-backed securities		$	931		$	45		$	—		$	976

Available for Sale:
U.S. Government sponsored entities debt securities		$	370,184		$	2,993		$	—		$	373,177
States and political subdivisions		12,265			729			—			12,994
U.S. Government sponsored entities mortgage-backed securities		1,077,146			20,981			(825		)	1,097,302
Corporate securities		8,403			148			—			8,551
Other		985			—			(15		)	970
Total		$	1,468,983		$	24,851		$	(840	)	$	1,492,994

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

		December 31, 2012
		Amortized			Estimated
		cost			fair value
		(Dollars in thousands)
Held to Maturity
Mortgage-backed securities		$	161,848		$	162,528
Available for Sale
Due in one year or less		$	170,435		$	170,933
Due after one year through five years		164,101			168,358
Due after five years through ten years		113,360			114,487
Due after ten years		140,225			141,018
Mortgage-backed securities		925,018			941,043
Other		866			906
Total		$	1,514,005		$	1,536,745

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 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	)

At December 31, 2011:
U.S. Government sponsored entities mortgage-backed securities		$	144,520		$	(825	)	$	—		$	—		$	144,520		$	(825	)
Other		970			(15		)	—			—			970			(15		)
Total temporarily impaired securities		$	145,490		$	(840	)	$	—		$	—		$	145,490		$	(840	)