
	December 31, 2023
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Allowance for Credit Losses		Fair Value

Available-for-sale:
U.S. Treasury	$	159,715	$	—	$	(11,093)	$	—	$	148,622
U.S. government agency	55,359		—		(3,262)		—		52,097
Municipal	229,030		26		(23,499)		—		205,557
Mortgage-backed:
Agency residential	188,641		61		(14,718)		—		173,984
Agency commercial	141,214		3		(14,205)		—		127,012
Corporate	57,665		9		(5,485)		—		52,189
Total available-for-sale	$	831,624	$	99	$	(72,262)	$	—	$	759,461

	December 31, 2023
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Allowance for Credit Losses

Held-to-maturity:
U.S. government agency	$	88,448	$	—	$	(8,292)	$	80,156	$	—
Municipal	38,442		394		(163)		38,673		—
Mortgage-backed:
Agency residential	95,828		—		(5,569)		90,259		—
Agency commercial	298,721		—		(41,313)		257,408		—
Total held-to-maturity	$	521,439	$	394	$	(55,337)	$	466,496	$	—


	December 31, 2022
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value

Available-for-sale:
U.S. Treasury	$	169,860	$	—	$	(15,345)	$	154,515
U.S. government agency	59,291		—		(4,134)		55,157
Municipal	275,972		46		(32,189)		243,829
Mortgage-backed:
Agency residential	213,676		5		(18,240)		195,441
Agency commercial	150,060		—		(17,172)		132,888
Corporate	65,597		55		(3,958)		61,694
Total available-for-sale	$	934,456	$	106	$	(91,038)	$	843,524

	December 31, 2022
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value

Held-to-maturity:
U.S. government agency	$	88,424	$	—	$	(9,728)	$	78,696
Municipal	42,167		195		(314)		42,048
Mortgage-backed:
Agency residential	102,728		—		(6,470)		96,258
Agency commercial	308,281		—		(46,482)		261,799
Total held-to-maturity	$	541,600	$	195	$	(62,994)	$	478,801

On March 31, 2022, the Company transferred certain debt securities from the available-for-sale category to the held-to-maturity category in order to better reflect the revised intentions of the Company due to possible market value volatility, resulting from a potential rise in interest rates. The following is a summary of the amortized cost and fair value of securities transferred to the held-to-maturity category:

The debt securities were transferred between categories at fair value, with the transfer date fair value becoming the new amortized cost for each security transferred. The unrealized gain (loss), net of tax, at the date of transfer remains a component of accumulated other comprehensive income (loss), but will be amortized over the remaining life of the debt securities as an adjustment of yield in a manner consistent with amortization of any premium or discount. As a result, the amortization of an unrealized gain (loss) reported in accumulated other comprehensive income (loss) will offset or mitigate the effect on interest income of the amortization of the premium or discount for that held-to-maturity debt security.

As of December 31, 2023 and 2022, the Bank had debt securities with a carrying value of $419.4 million and $332.6 million, respectively, which were pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes required or permitted by law.

The amortized cost and fair value of debt securities by contractual maturity, as of December 31, 2023, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.


	Available-for-Sale				Held-to-Maturity
(dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value

Due in 1 year or less	$	46,534	$	45,564	$	2,138	$	2,141
Due after 1 year through 5 years	208,581		196,431		35,590		34,269
Due after 5 years through 10 years	199,695		174,573		83,488		77,094
Due after 10 years	46,959		41,897		5,674		5,325

Mortgage-backed:
Agency residential	188,641		173,984		95,828		90,259
Agency commercial	141,214		127,012		298,721		257,408
Total	$	831,624	$	759,461	$	521,439	$	466,496

The following table presents gross unrealized losses and fair value of debt securities available-for-sale that do not have an associated allowance for credit losses as of December 31, 2023, aggregated by category and length of time that individual debt securities have been in a continuous unrealized loss position:


	December 31, 2023
	Investments in a Continuous Unrealized Loss Position
	Less than 12 Months				12 Months or More				Total
(dollars in thousands)	Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value

Available-for-sale:
U.S. Treasury	$	—	$	—	$	(11,093)	$	148,622	$	(11,093)	$	148,622
U.S. government agency	(2)		168		(3,260)		51,910		(3,262)		52,078
Municipal	(26)		4,749		(23,473)		194,287		(23,499)		199,036
Mortgage-backed:
Agency residential	(163)		9,354		(14,555)		156,785		(14,718)		166,139
Agency commercial	(26)		3,016		(14,179)		123,404		(14,205)		126,420
Corporate	(414)		4,361		(5,071)		45,826		(5,485)		50,187
Total available-for-sale	$	(631)	$	21,648	$	(71,631)	$	720,834	$	(72,262)	$	742,482

The following table presents gross unrealized losses and fair value of debt securities, aggregated by category and length of time that individual debt securities have been in a continuous unrealized loss position, as of December 31, 2022:


	December 31, 2022
	Investments in a Continuous Unrealized Loss Position
	Less than 12 Months				12 Months or More				Total
(dollars in thousands)	Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value

Available-for-sale:
U.S. Treasury	$	(8,401)	$	92,445	$	(6,944)	$	62,070	$	(15,345)	$	154,515
U.S. government agency	(2,980)		47,370		(1,154)		7,787		(4,134)		55,157
Municipal	(10,906)		149,261		(21,283)		87,794		(32,189)		237,055
Mortgage-backed:
Agency residential	(8,332)		127,288		(9,908)		65,692		(18,240)		192,980
Agency commercial	(4,764)		62,672		(12,408)		70,216		(17,172)		132,888
Corporate	(2,594)		52,190		(1,364)		5,600		(3,958)		57,790
Total available-for-sale	(37,977)		531,226		(53,061)		299,159		(91,038)		830,385
Held-to-maturity:
U.S. government agency	(1,754)		15,751		(7,974)		62,945		(9,728)		78,696
Municipal	(314)		23,433		—		—		(314)		23,433
Mortgage-backed:
Agency residential	(4,039)		78,452		(2,431)		17,806		(6,470)		96,258
Agency commercial	(16,716)		103,298		(29,766)		158,501		(46,482)		261,799
Total held-to-maturity	(22,823)		220,934		(40,171)		239,252		(62,994)		460,186
Total debt securities	$	(60,800)	$	752,160	$	(93,232)	$	538,411	$	(154,032)	$	1,290,571

U.S. Treasury, U.S. government agency, and agency mortgage-backed securities are considered to have no risk of credit loss as they are either explicitly or implicitly guaranteed by the U.S. government. The changes in fair value in these portfolios are considered to be primarily driven by changes in market interest rates and other non-credit risks, such as prepayment and liquidity risks.

Municipal securities include approximately 79% general obligation bonds as of December 31, 2023, which have a very low historical default rate due to issuers generally having taxing authority to service the debt. The remainder of the municipal securities are also of high credit quality with ratings of A1/A+ or better. The Company evaluates credit risk through monitoring credit ratings and reviews of available financial data. The changes in fair value in these portfolios are considered to be primarily driven by changes in market interest rates and other non-credit risks, such as call and liquidity risks. The estimated allowance for credit losses for the municipal debt securities held-to-maturity was deemed insignificant.

Corporate securities include investment grade corporate and bank subordinated debt securities. The Company evaluates credit risk through monitoring credit ratings, reviews of available issuer financial data, and sector trends. The changes in fair value in corporate securities was considered to be primarily driven by changes in market interest rates and other non-credit risks, such as call and liquidity risks.

As of December 31, 2023, the Company did not intend to sell the debt securities that are in an unrealized loss position, and it was more likely than not that the Company would recover the amortized cost prior to being required to sell the debt securities.

Equity securities with readily determinable fair values are measured at fair value with changes in fair value recognized in unrealized gains (losses) on equity securities on the consolidated statements of income. The Company has elected to measure equity securities with no readily determinable fair value at cost minus impairment, if any, plus or minus changes resulting from observable price changes for identical or similar securities of the same issuer.

As of December 31, 2023, the cumulative net unrealized losses on equity securities with no readily determinable fair value reflect impairments of $0.2 million and downward adjustments based on observable price changes of an identical investment of $0.2 million. As of December 31, 2022, the cumulative net unrealized losses on equity securities with no readily determinable fair value reflect downward adjustments based on observable price changes of an identical investment. There have been no upward adjustments based on observable price changes to equity securities with no readily determinable fair value.