SECURITIES (Tables)

6 Months Ended

Jun. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Amortized Cost and Fair Value of Securities Available for Sale and Held for Investment

The amortized cost, unrealized gains and losses, and fair value of securities available for sale and held to maturity at June 30, 2017 and December 31, 2016 are summarized as follows:

	June 30, 2017
	Gross		Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(Dollars in thousands)	Cost		Gains		Losses		Value
SECURITIES AVAILABLE FOR SALE
U.S. Treasury securities and obligations of U.S. Government Sponsored Entities	$	10,907	$	300	$	0	$	11,207
Mortgage backed securities of U.S. Government Sponsored Entities		291,482		1,250		(2,632)		290,100
Collateralized mortgage obligations of U.S. Government Sponsored Entities		217,634		614		(3,951)		214,297
Commercial mortgage backed securities of U.S. Government Sponsored Entities		22,304		506		(9)		22,801
Private mortgage backed securities		32,860		864		(92)		33,632
Private collateralized mortgage obligations		55,828		616		(488)		55,956
Collateralized loan obligations		222,725		455		(41)		223,139
Obligations of state and political subdivisions		62,847		938		(385)		63,400
Corporate and other debt securities		70,930		676		(168)		71,438
Private commercial mortgage backed securities		30,780		189		(195)		30,774
	$	1,018,297	$	6,408	$	(7,961)	$	1,016,744
SECURITIES HELD TO MATURITY
Mortgage backed securities of U.S. Government Sponsored Entities	$	183,877	$	1,413	$	(959)	$	184,331
Collateralized mortgage obligations of U.S. Government Sponsored Entities		135,596		461		(1,564)		134,493
Commercial mortgage backed securities of U.S. Government Sponsored Entities		17,420		585		0		18,005
Collateralized loan obligations		54,325		378		0		54,703
Private collateralized mortgage obligations		5,878		8		(61)		5,825
	$	397,096	$	2,845	$	(2,584)	$	397,357

	December 31, 2016
	Gross		Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(Dollars in thousands)	Cost		Gains		Losses		Value
SECURITIES AVAILABLE FOR SALE
U.S. Treasury securities and obligations of U.S. Government Sponsored Entities	$	12,073	$	255	$	0	$	12,328
Mortgage backed securities of U.S. Government Sponsored Entities		287,726		585		(4,823)		283,488
Collateralized mortgage obligations of U.S. Government Sponsored Entities		238,805		314		(5,065)		234,054
Commercial mortgage backed securities of U.S. Government Sponsored Entities		22,351		222		(28)		22,545
Private mortgage backed securities		32,780		0		(791)		31,989
Private collateralized mortgage obligations		67,542		563		(816)		67,289
Collateralized loan obligations		124,716		838		(665)		124,889
Obligations of state and political subdivisions		63,161		622		(895)		62,888
Corporate and other debt securities		74,121		257		(517)		73,861
Private commercial mortgage backed securities		37,534		111		(473)		37,172
	$	960,809	$	3,767	$	(14,073)	$	950,503
SECURITIES HELD TO MATURITY
Mortgage backed securities of U.S. Government Sponsored Entities	$	159,941	$	704	$	(1,243)	$	159,402
Collateralized mortgage obligations of U.S. Government Sponsored Entities		147,208		386		(2,630)		144,964
Commercial mortgage backed securities of U.S. Government Sponsored Entities		17,375		233		(74)		17,534
Collateralized loan obligations		41,547		430		(314)		41,663
Private collateralized mortgage obligations		6,427		0		(109)		6,318
	$	372,498	$	1,753	$	(4,370)	$	369,881

Amortized Cost and Fair Value of Securities by Contractual Maturity

The amortized cost and fair value of securities available for sale and held to maturity at June 30, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because prepayments of the underlying collateral for these securities may occur, due to the right to call or repay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.

	Held to Maturity				Available for Sale
	Amortized		Fair		Amortized		Fair
(Dollars in thousands)	Cost		Value		Cost		Value
Due in less than one year	$	0	$	0	$	10,076	$	10,318
Due after one year through five years		3,600		3,600		85,126		85,641
Due after five years through ten years		50,725		51,103		233,030		234,071
Due after ten years		0		0		28,636		28,605
		54,325		54,703		356,868		358,635
Mortgage backed securities of U.S. Government Sponsored Entities		183,877		184,331		291,482		290,100
Collateralized mortgage obligations of  U.S. Government Sponsored Entities		135,596		134,493		217,634		214,297
Commercial mortgage backed securities of U.S. Government Sponsored Entities		17,420		18,005		22,304		22,801
Private mortgage backed securities		0		0		32,860		33,632
Private collateralized mortgage obligations		5,878		5,825		55,828		55,956
Other debt securities		0		0		10,541		10,549
Private commercial mortgage backed securities		0		0		30,780		30,774
	$	397,096	$	397,357	$	1,018,297	$	1,016,744

Schedule of Unrealized Loss and Fair Value on Investments

The tables below indicate the amount of securities with unrealized losses and the period of time for which these losses were outstanding at June 30, 2017 and December 31, 2016, respectively.

	June 30, 2017
	Less than 12 months				12 months or longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(Dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities of U.S. Government Sponsored Entities	$	205,658	$	(2,975)	$	48,199	$	(616)	$	253,857	$	(3,591)
Collateralized mortgage obligations of U.S. Government Sponsored Entities		87,147		(1,438)		168,324		(4,077)		255,471		(5,515)
Commercial mortgage backed securities of U.S. Government Sponsored Entities		3,119		(9)		0		0		3,119		(9)
Private mortgage backed securities		0		0		6,864		(153)		6,864		(153)
Private collateralized mortgage obligations		0		0		26,129		(488)		26,129		(488)
Collateralized loan obligations		9,966		(34)		9,973		(7)		19,939		(41)
Obligations of state and political subdivisions		15,716		(287)		2,916		(98)		18,632		(385)
Corporate and other debt securities		12,873		(164)		2,388		(4)		15,261		(168)
Private commercial mortgage backed securities		11,126		(185)		1,965		(10)		13,091		(195)
Total temporarily impaired securities	$	345,605	$	(5,092)	$	266,758	$	(5,453)	$	612,363	$	(10,545)

	December 31, 2016
	Less than 12 months				12 months or longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(Dollars in thousands)	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities of U.S. Government Sponsored Entities	$	327,759	$	(5,991)	$	5,387	$	(75)	$	333,146	$	(6,066)
Collateralized mortgage obligations of U.S. Government Sponsored Entities		234,175		(5,599)		58,912		(2,096)		293,087		(7,695)
Commercial mortgage backed securities of U.S. Government Sponsored Entities		7,934		(102)		0		0		7,934		(102)
Private mortgage backed securities		0		0		36,848		(900)		36,848		(900)
Private collateralized mortgage obligations		1,460		0		38,417		(816)		39,877		(816)
Collateralized loan obligations		8,152		(41)		51,694		(938)		59,846		(979)
Obligations of state and political subdivisions		39,321		(895)		0		0		39,321		(895)
Corporate and other debt securities		33,008		(517)		0		0		33,008		(517)
Private commercial mortgage backed securities		12,667		(306)		7,139		(167)		19,806		(473)
Total temporarily impaired securities	$	664,476	$	(13,451)	$	198,397	$	(4,992)	$	862,873	$	(18,443)