Investment Securities (Tables)

6 Months Ended

Jun. 30, 2020

Investment Securities [Abstract]

Amortization Cost And Estimated Fair Value Of Investment Securities

	June 30, 2020
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(in thousands)	Cost		Gains		Losses		Value
State and municipals	$	358,607	$	14,950	$	(1)	$	373,556
Pass-through mortgage securities		114,139		2,860		(2)		116,997
Collateralized mortgage obligations		146,781		4,488		(5)		151,264
Corporate bonds		119,000		—		(12,785)		106,215
	$	738,527	$	22,298	$	(12,793)	$	748,032
	December 31, 2019
State and municipals	$	372,113	$	10,269	$	(239)	$	382,143
Pass-through mortgage securities		60,307		1,104		(39)		61,372
Collateralized mortgage obligations		136,211		2,247		(259)		138,199
Corporate bonds		119,000		—		(3,170)		115,830
	$	687,631	$	13,620	$	(3,707)	$	697,544

Securities With A Continuous Unrealized Losses Position

	June 30, 2020
	Less than				12 Months
	12 Months				or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(in thousands)	Value		Loss		Value		Loss		Value		Loss
State and municipals	$	968	$	(1)	$	—	$	—	$	968	$	(1)
Pass-through mortgage securities		10,269		(2)		—		—		10,269		(2)
Collateralized mortgage obligations		10,202		(5)		—		—		10,202		(5)
Corporate bonds		28,560		(3,440)		77,655		(9,345)		106,215		(12,785)
Total temporarily impaired	$	49,999	$	(3,448)	$	77,655	$	(9,345)	$	127,654	$	(12,793)
	December 31, 2019
State and municipals	$	6,662	$	(83)	$	5,084	$	(156)	$	11,746	$	(239)
Pass-through mortgage securities		5,287		(14)		4,084		(25)		9,371		(39)
Collateralized mortgage obligations		30,886		(259)		—		—		30,886		(259)
Corporate bonds		51,020		(980)		64,810		(2,190)		115,830		(3,170)
Total temporarily impaired	$	93,855	$	(1,336)	$	73,978	$	(2,371)	$	167,833	$	(3,707)

Maturities

(in thousands)	Amortized Cost		Fair Value
Within one year	$	9,781	$	9,861
After 1 through 5 years		75,073		77,447
After 5 through 10 years		253,291		246,026
After 10 years		139,462		146,437
Mortgage-backed securities		260,920		268,261
	$	738,527	$	748,032