SECURITIES (Tables)

9 Months Ended

Sep. 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 September 30, 2017 and December 31, 2016 are summarized as follows:

	September 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	$	9,830	$	310	$	0	$	10,140
Mortgage backed securities of U.S. Government Sponsored Entities		284,015		1,245		(2,298)		282,962
Collateralized mortgage obligations of U.S. Government Sponsored Entities		232,278		525		(4,001)		228,802
Commercial mortgage backed securities of U.S. Government Sponsored Entities		22,274		355		(10)		22,619
Private mortgage backed securities		32,928		925		0		33,853
Private collateralized mortgage obligations		50,725		682		(302)		51,105
Collateralized loan obligations		207,341		794		(18)		208,117
Obligations of state and political subdivisions		59,495		1,065		(375)		60,185
Corporate and other debt securities		70,083		803		(89)		70,797
Private commercial mortgage backed securities		28,186		198		(165)		28,219
	$	997,155	$	6,902	$	(7,258)	$	996,799
SECURITIES HELD TO MATURITY
Mortgage backed securities of U.S. Government Sponsored Entities	$	179,437	$	1,403	$	(996)	$	179,844
Collateralized mortgage obligations of U.S. Government Sponsored Entities		126,849		462		(1,506)		125,805
Commercial mortgage backed securities of U.S. Government Sponsored Entities		17,441		645		0		18,086
Collateralized loan obligations		45,438		228		0		45,666
Private collateralized mortgage obligations		5,608		8		(56)		5,560
	$	374,773	$	2,746	$	(2,558)	$	374,961

	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 September 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	$	6,103	$	6,108
Due after one year through five years		3,600		3,614		79,463		80,338
Due after five years through ten years		41,838		42,052		224,255		225,737
Due after ten years		0		0		26,525		26,635
		45,438		45,666		336,346		338,818
Mortgage backed securities of U.S. Government Sponsored Entities		179,437		179,844		284,015		282,962
Collateralized mortgage obligations of  U.S. Government Sponsored Entities		126,849		125,805		232,278		228,802
Commercial mortgage backed securities of U.S. Government Sponsored Entities		17,441		18,086		22,274		22,619
Private mortgage backed securities		0		0		32,928		33,853
Private collateralized mortgage obligations		5,608		5,560		50,725		51,105
Other debt securities		0		0		10,403		10,421
Private commercial mortgage backed securities		0		0		28,186		28,219
	$	374,773	$	374,961	$	997,155	$	996,799

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 September 30, 2017 and December 31, 2016, respectively.

	September 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	$	152,796	$	(1,963)	$	109,433	$	(1,331)	$	262,229	$	(3,294)
Collateralized mortgage obligations of U.S. Government Sponsored Entities		51,067		(365)		225,546		(5,142)		276,613		(5,507)
Commercial mortgage-backed securities of U.S. Government Sponsored Entities		3,111		(10)		0		0		3,111		(10)
Private mortgage backed securities		0		0		0		0		0		0
Private collateralized mortgage obligations		0		0		22,003		(358)		22,003		(358)
Collateralized loan obligations		21,998		(18)		0		0		21,998		(18)
Obligations of state and political subdivisions		11,556		(86)		5,639		(289)		17,195		(375)
Corporate and other debt securities		998		0		8,301		(89)		9,299		(89)
Private commercial mortgage backed securities		7,887		(95)		3,727		(70)		11,614		(165)
Total temporarily impaired securities	$	249,413	$	(2,537)	$	374,649	$	(7,279)	$	624,062	$	(9,816)

	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)