INVESTMENT SECURITIES (Tables)

6 Months Ended

Jun. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost and related market value of investment securities available-for-sale

Investment Portfolio Composition. The amortized cost and related market value of investment securities available-for-sale and
held-to-maturity were as follows:
	June 30, 2017									December 31, 2016
	Amortized		Unrealized		Unrealized		Market		Amortized		Unrealized		Unrealized		Market
	Cost		Gains		Losses		Value		Cost		Gain		Losses		Value
Available for Sale
U.S. Government Treasury	$	277,718	$	55	$	808	$	276,965	$	286,867	$	262	$	851	$	286,278
U.S. Government Agency		142,400		774		280		142,894		131,489		495		344		131,640
States and Political Subdivisions		99,899		155		76		99,978		95,197		23		381		94,839
Mortgage-Backed Securities		1,246		116		-		1,362		1,312		118		-		1,430
Equity Securities(1)		8,487		-		-		8,487		8,547		-		-		8,547
Total	$	529,750	$	1,100	$	1,164	$	529,686	$	523,412	$	898	$	1,576	$	522,734
Held to Maturity
U.S. Government Treasury	$	83,246	$	1	$	166	$	83,081	$	119,131	$	107	$	81	$	119,157
States and Political Subdivisions		7,351		25		2		7,374		8,175		1		38		8,138
Mortgage-Backed Securities		66,477		71		493		66,055		50,059		29		637		49,451
Total	$	157,074	$	97	$	661	$	156,510	$	177,365	$	137	$	756	$	176,746
Total Investment Securities	$	686,824	$	1,197	$	1,825	$	686,196	$	700,777	$	1,035	$	2,332	$	699,480

Schedule of investment securities with maturity distribution based on contractual maturities

	Available for Sale				Held to Maturity
(Dollars in Thousands)	Amortized Cost		Market Value		Amortized Cost		Market Value
Due in one year or less	$	164,458	$	164,400	$	48,640	$	48,584
Due after one through five years		252,755		251,947		41,957		41,871
Mortgage-Backed Securities		1,246		1,362		66,477		66,055
U.S. Government Agency		102,804		103,490		-		-
Equity Securities		8,487		8,487		-		-
Total	$	529,750	$	529,686	$	157,074	$	156,510

Schedule of investment securities with continuous unrealized loss position

	Less Than				Greater Than
	12 Months				12 Months				Total
	Market		Unrealized		Market		Unrealized		Market		Unrealized
(Dollars in Thousands)	Value		Losses		Value		Losses		Value		Losses
June 30, 2017
Available for Sale
U.S. Government Treasury	$	221,874	$	808	$	-	$	-	$	221,874	$	808
U.S. Government Agency		46,260		201		9,608		79		55,868		280
States and Political Subdivisions		37,984		69		1,063		7		39,047		76
Mortgage-Backed Securities		-		-		3		-		3		-
Total		306,118		1,078		10,674		86		316,792		1,164
Held to Maturity
U.S. Government Treasury		78,091		166		-		-		78,091		166
States and Political Subdivisions		1,065		2		-		-		1,065		2
Mortgage-Backed Securities		34,840		441		4,067		52		38,907		493
Total	$	113,996	$	609	$	4,067	$	52	$	118,063	$	661
December 31, 2016
Available for Sale
U.S. Government Treasury	$	116,704	$	851	$	-	$	-	$	116,704	$	851
U.S. Government Agency		48,520		310		6,699		34		55,219		344
States and Political Subdivisions		81,521		380		294		1		81,815		381
Mortgage-Backed Securities		3		-		-		-		3		-
Total		246,748		1,541		6,993		35		253,741		1,576
Held to Maturity
U.S. Government Treasury		35,210		81		-		-		35,210		81
States and Political Subdivisions		7,491		38		-		-		7,491		38
Mortgage-Backed Securities		36,710		599		4,010		38		40,720		637
Total	$	79,411	$	718	$	4,010	$	38	$	83,421	$	756