INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2020

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

			March 31, 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			$	186,184	$	1,559	$	(7,399)	$	180,344	$	260,294	$	887	$	(2,686)	$	258,495
State and municipal				271,771		6,106		(1,428)		276,449		229,309		4,377		(37)		233,649
Mortgage-backed and asset-backed				698,029		20,631		(178)		718,482		568,373		3,268		(882)		570,759
Corporate debt				12,150		182		-		12,332		9,100		452		-		9,552
Trust preferred				-		-		-		-		310		-		-		310
	Total debt securities			1,168,134		28,478		(9,005)		1,187,607		1,067,386		8,984		(3,605)		1,072,765
Marketable equity securities				-		-		-		-		568		-		-		568
		Total investments available-for-sale	$	1,168,134	$	28,478	$	(9,005)	$	1,187,607	$	1,067,954	$	8,984	$	(3,605)	$	1,073,333

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

		March 31, 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		$	68,673	$	25,074	$	-	$	86,597	$	180,344
State and municipal			25,296		66,226		72,676		112,251		276,449
Mortgage-backed and asset-backed			-		4,413		52,349		661,720		718,482
Corporate debt			-		-		12,332		-		12,332
Trust preferred			-		-		-		-		-
	Total available-for-sale debt securities	$	93,969	$	95,713	$	137,357	$	860,568	$	1,187,607
		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)		March 31, 2020		December 31, 2019
Federal Reserve Bank stock		$	22,581	$	22,559
Federal Home Loan Bank of Atlanta stock			39,804		29,244
Marketable equity securities			568		-
	Total equity securities	$	62,953	$	51,803

Available-for-Sale Securities

Gross Unrealized Losses and Fair Value by Length of Time

		March 31, 2020
						Continuous Unrealized
						Losses Existing for:
		Number								Total
		of				Less than		More than		Unrealized
(Dollars in thousands)		Securities		Fair Value		12 months		12 months		Losses
U.S. treasuries and government agencies			6	$	86,597	$	3,624	$	3,775	$	7,399
State and municipal			14		44,737		1,428		-		1,428
Mortgage-backed and asset-backed			8		24,981		144		34		178
	Total		28	$	156,315	$	5,196	$	3,809	$	9,005

		December 31, 2019
						Continuous Unrealized
						Losses Existing for:
		Number								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