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INVESTMENT SECURITIES (Tables)

3 Months Ended

Mar. 31, 2015

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)
At March 31, 2015:
Held to Maturity:
Mortgage-backed securities - U.S. Government sponsored entities		$	255,592		$	1,446		$	(681	)	$	256,357

Available for Sale:
Debt securities:
States and political subdivisions		$	189,961		$	3,380		$	(863	)	$	192,478
Corporate securities		98,847			2,480			—			101,327
Mortgage-backed securities:
U.S. Government sponsored entities		776,750			12,912			(2,616		)	787,046
Non-agency collateralized mortgage obligations		208,455			8,412			(81		)	216,786
Other		747			103			—			850
Total		$	1,274,760		$	27,287		$	(3,560	)	$	1,298,487

At December 31, 2014:
Held to Maturity:
Mortgage-backed securities - U.S. Government sponsored entities		$	238,287		$	196		$	(2,886	)	$	235,597

Available for Sale:
Debt securities:
States and political subdivisions		$	191,280		$	2,054		$	(1,689	)	$	191,645
Corporate securities		99,237			1,492			(125		)	100,604
Mortgage-backed securities:
U.S. Government sponsored entities		744,527			11,064			(4,033		)	751,558
Non-agency collateralized mortgage obligations		180,905			4,456			(1,027		)	184,334
Other		757			120			—			877
Total		$	1,216,706		$	19,186		$	(6,874	)	$	1,229,018

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

		March 31, 2015
		Amortized Cost			Estimated Fair Value
		(Dollars in thousands)
Held to Maturity
Mortage-backed securities		$	255,592		$	256,357

Available for Sale
Due in one year or less		$	—		$	—
Due after one year through five years		70,129			71,798
Due after five years through ten years		103,461			105,207
Due after ten years		115,218			116,800
Mortage-backed securities		985,205			1,003,832
Other		747			850
Total		$	1,274,760		$	1,298,487

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, 2015:
Debt securities:
States and political subdivisions		$	34,821		$	(257	)	$	23,447		$	(606	)	$	58,268		$	(863	)
Corporate securities		—			—			—			—			—			—
Mortgage-backed securities:
U.S. Government sponsored entities		143,680			(1,298		)	176,086			(1,999		)	319,766			(3,297		)
Non-agency collateralized mortgage obligations		31,664			(81		)	—			—			31,664			(81		)
Total temporarily impaired securities		$	210,165		$	(1,636	)	$	199,533		$	(2,605	)	$	409,698		$	(4,241	)

At December 31, 2014:
Debt securities:
States and political subdivisions		$	23,591		$	(145	)	$	68,622		$	(1,544	)	$	92,213		$	(1,689	)
Corporate securities		23,938			(125		)	—			—			23,938			(125		)
Mortgage-backed securities:
U.S. Government sponsored entities		119,210			(521		)	403,926			(6,398		)	523,136			(6,919		)
Non-agency collateralized mortgage obligations		20,857			(100		)	47,539			(927		)	68,396			(1,027		)
Total temporarily impaired securities		$	187,596		$	(891	)	$	520,087		$	(8,869	)	$	707,683		$	(9,760	)