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Investment securities (Tables)

6 Months Ended

Jun. 30, 2023

Investment Securities

Schedule of amortized cost and fair value of investment securities aggregated by investment category


		June 30, 2023
					Gross			Gross
		Amortized			Unrealized			Unrealized			Fair
(Dollars in thousands)		Cost			Gains			Losses			Value
Available for sale:
U.S. Treasury securities		$	197,746		$			$	18,642		$	179,104
U.S. government-sponsored enterprises			2,605						404			2,201
State and municipals:
Taxable			68,391						12,029			56,362
Tax-exempt			76,683						9,819			66,864
Residential mortgage-backed securities:
U.S. government agencies			897						48			849
U.S. government-sponsored enterprises			94,065						18,692			75,373
Commercial mortgage-backed securities:
U.S. government-sponsored enterprises			12,082						584			11,498
Corporate debt securities			4,000						425			3,575
Total		$	456,469		$			$	60,643		$	395,826
Held to maturity:
Tax-exempt state and municipals		$	11,219		$	1		$	788		$	10,432
Residential mortgage-backed securities:
U.S. government agencies			16,360						2,859			13,501
U.S. government-sponsored enterprises			60,632						10,552			50,080
Total		$	88,211		$	1		$	14,199		$	74,013


		December 31, 2022
					Gross			Gross
		Amortized			Unrealized			Unrealized			Fair
(Dollars in thousands)		Cost			Gains			Losses			Value
Available for sale:
U.S. Treasury securities		$	199,937		$			$	19,640		$	180,297
U.S. government-sponsored enterprises			16,955						585			16,370
State and municipals:
Taxable			68,946						13,588			55,358
Tax-exempt			99,774			93			11,460			88,407
Residential mortgage-backed securities:
U.S. government agencies			982						40			942
U.S. government-sponsored enterprises			141,231						20,112			121,119
Commercial mortgage-backed securities:
U.S. government-sponsored enterprises			12,128						544			11,584
Corporate debt securities			4,000						374			3,626
Total		$	543,953		$	93		$	66,343		$	477,703
Held to maturity:
Tax-exempt state and municipals		$	11,237		$	1		$	841		$	10,397
Residential mortgage-backed securities:
U.S. government agencies			17,304						3,016			14,288
U.S. government-sponsored enterprises			62,638						10,760			51,878
Total		$	91,179		$	1		$	14,617		$	76,563

Schedule of fair value and unrealized losses of investment securities in continuous unrealized loss position


		June 30, 2023
		Less Than 12 Months								12 Months or Greater								Total
		Number of								Number of								Number of
		Securities in a		Fair			Unrealized			Securities in a		Fair			Unrealized			Securities in a		Fair			Unrealized
(Dollars in thousands)		Loss Position		Value			Losses			Loss Position		Value			Losses			Loss Position		Value			Losses
U.S. Treasury securities				$			$			43		$	179,104		$	18,642		43		$	179,104		$	18,642
U.S. government-sponsored enterprises										2			2,201			404		2			2,201			404
State and municipals:
Taxable		3			1,984			24		64			54,378			12,005		67			56,362			12,029
Tax-exempt		11			4,217			75		100			70,868			10,532		111			75,085			10,607
Residential mortgage-backed securities:
U.S. government agencies										8			14,350			2,907		8			14,350			2,907
U.S. government-sponsored enterprises										41			125,453			29,244		41			125,453			29,244
Commercial mortgage-backed securities:
U.S. government agencies
U.S. government-sponsored enterprises										4			11,498			584		4			11,498			584
Corporate debt securities										6			3,575			425		6			3,575			425
Total		14		$	6,201		$	99		268		$	461,427		$	74,743		282		$	467,628		$	74,842


		December 31, 2022
		Less Than 12 Months								12 Months or Greater								Total
		Number of								Number of								Number of
		Securities in a		Fair			Unrealized			Securities in a		Fair			Unrealized			Securities in a		Fair			Unrealized
(Dollars in thousands)		Loss Position		Value			Losses			Loss Position		Value			Losses			Loss Position		Value			Losses
U.S. Treasury securities		5		$	23,700		$	1,887		40		$	156,597		$	17,753		45		$	180,297		$	19,640
U.S. government-sponsored enterprises		4			14,104			197		1			2,266			388		5			16,370			585
State and municipals:
Taxable		21			19,919			2,908		45			34,464			10,680		66			54,383			13,588
Tax-exempt		39			30,973			1,690		84			59,664			10,611		123			90,637			12,301
Residential mortgage-backed securities:
U.S. government agencies		5			904			39		4			14,326			3,017		9			15,230			3,056
U.S. government-sponsored enterprises		19			57,166			2,029		25			115,831			28,843		44			172,997			30,872
Commercial mortgage-backed securities:
U.S. government-sponsored enterprises		4			11,584			544										4			11,584			544
Corporate debt securities		1			953			47		5			2,673			327		6			3,626			374
Total		98		$	159,303		$	9,341		204		$	385,821		$	71,619		302		$	545,124		$	80,960

Available-for-Sale Securities

Investment Securities

Schedule of maturity distribution of fair value


		Fair
(Dollars in thousands)		Value
Within one year		$	6,311
After one but within five years			176,620
After five but within ten years			57,527
After ten years			65,447
			305,905
Mortgage-backed and other amortizing securities			89,921
Total		$	395,826

Held-to-maturity Securities.

Investment Securities

Schedule of maturity distribution of fair value


		Amortized			Fair
(Dollars in thousands)		Cost			Value
After five but within ten years		$	8,869		$	8,263
After ten years			2,350			2,169
			11,219			10,432
Mortgage-backed securities			76,992			63,581
Total		$	88,211		$	74,013