Investment Securities (Tables)

3 Months Ended

Mar. 31, 2020

Investment Securities [Abstract]

Amortization Cost And Estimated Fair Value Of Investment Securities

	March 31, 2020
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(in thousands)	Cost		Gains		Losses		Value
State and municipals	$	365,652	$	10,318	$	(127)	$	375,843
Pass-through mortgage securities		56,555		2,088		—		58,643
Collateralized mortgage obligations		137,193		5,125		(23)		142,295
Corporate bonds		119,000		—		(16,318)		102,682
	$	678,400	$	17,531	$	(16,468)	$	679,463
	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

	March 31, 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	$	7,765	$	(127)	$	—	$	—	$	7,765	$	(127)
Collateralized mortgage obligations		9,691		(23)		—		—		9,691		(23)
Corporate bonds		28,120		(3,880)		74,562		(12,438)		102,682		(16,318)
Total temporarily impaired	$	45,576	$	(4,030)	$	74,562	$	(12,438)	$	120,138	$	(16,468)
	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	$	8,598	$	8,629
After 1 through 5 years		72,675		73,963
After 5 through 10 years		263,976		251,385
After 10 years		139,403		144,548
Mortgage-backed securities		193,748		200,938
	$	678,400	$	679,463