INVESTMENTS (Tables)

6 Months Ended

Jun. 30, 2020

Amortized cost and Estimated fair values of Investments Available-for-sale

			June 30, 2020								December 31, 2019
					Gross		Gross		Estimated				Gross		Gross		Estimated
			Amortized		Unrealized		Unrealized		Fair		Amortized		Unrealized		Unrealized		Fair
(In thousands)			Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
U.S. treasuries and government agencies			$	171,465	$	1,126	$	(4,519)	$	168,072	$	260,294	$	887	$	(2,686)	$	258,495
State and municipal				289,513		8,194		(127)		297,580		229,309		4,377		(37)		233,649
Mortgage-backed and asset-backed				852,063		26,021		(129)		877,955		568,373		3,268		(882)		570,759
Corporate debt				12,131		64		(3)		12,192		9,100		452		-		9,552
Trust preferred				-		-		-		-		310		-		-		310
	Total debt securities			1,325,172		35,405		(4,778)		1,355,799		1,067,386		8,984		(3,605)		1,072,765
Marketable equity securities				-		-		-		-		568		-		-		568
		Total investments available-for-sale	$	1,325,172	$	35,405	$	(4,778)	$	1,355,799	$	1,067,954	$	8,984	$	(3,605)	$	1,073,333

Estimated fair values of debt securities available-for-sale by contractual maturity

		June 30, 2020
		One Year		One to		Five to		After Ten
(In thousands)		or less		Five Years		Ten Years		Years		Total
U.S. treasuries and government agencies		$	52,841	$	18,052	$	-	$	97,179	$	168,072
State and municipal			27,442		56,893		59,014		154,231		297,580
Mortgage-backed and asset-backed			2		22,202		60,454		795,297		877,955
Corporate debt			-		-		12,192		-		12,192
	Total available-for-sale debt securities	$	80,285	$	97,147	$	131,660	$	1,046,707	$	1,355,799
		December 31, 2019
		One Year		One to		Five to		After Ten
(In thousands)		or less		Five Years		Ten Years		Years		Total
U.S. treasuries and government agencies		$	69,799	$	96,709	$	-	$	91,987	$	258,495
State and municipal			33,311		76,723		75,820		47,795		233,649
Mortgage-backed and asset-backed			852		7,125		55,226		507,556		570,759
Corporate debt			-		-		9,552		-		9,552
Trust preferred			-		-		-		310		310
	Total available-for-sale debt securities	$	103,962	$	180,557	$	140,598	$	647,648	$	1,072,765

Other Equity Securities

(In thousands)		June 30, 2020		December 31, 2019
Federal Reserve Bank stock		$	38,650	$	22,559
Federal Home Loan Bank of Atlanta stock			29,526		29,244
Marketable equity securities			677		-
	Total equity securities	$	68,853	$	51,803

Available-for-Sale Securities

Gross Unrealized Losses and Fair Value by Length of Time

		June 30, 2020
						Continuous Unrealized
		Number				Losses Existing for:				Total
		of				Less than		More than		Unrealized
(Dollars in thousands)		Securities		Fair Value		12 months		12 months		Losses
U.S. treasuries and government agencies			8	$	90,594	$	1,437	$	3,082	$	4,519
State and municipal			13		35,194		127		-		127
Mortgage-backed and asset-backed			29		29,634		93		36		129
Corporate debt			1		508		3		-		3
	Total		51	$	155,930	$	1,660	$	3,118	$	4,778

		December 31, 2019
						Continuous Unrealized
		Number				Losses Existing for:				Total
		of				Less than		More than		Unrealized
(Dollars in thousands)		Securities		Fair Value		12 months		12 months		Losses
U.S. treasuries and government agencies			12	$	151,132	$	2,211	$	475	$	2,686
State and municipal			3		7,227		37		-		37
Mortgage-backed and asset-backed			35		184,784		508		374		882
	Total		50	$	343,143	$	2,756	$	849	$	3,605