Investment Securities and Other Investments (Tables)

12 Months Ended

Dec. 31, 2023

Schedule of Investments [Abstract]

Summary of Amortized Cost and Fair Values of Investment Securities

The following table presents amortized cost, fair values, and gross unrealized gains and losses of investment securities AFS as of the dates stated.

	December 31, 2023
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale
Mortgage backed securities	$	212,214	$	—	$	(35,244	)	$	176,970
U.S. Treasury and agencies		79,856		—		(10,985	)		68,871
State and municipal		50,682		—		(7,357	)		43,325
Corporate bonds		36,902		12		(4,999	)		31,915
Total investment securities	$	379,654	$	12	$	(58,585	)	$	321,081

	December 31, 2022
(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available for sale
Mortgage backed securities	$	230,015	$	51	$	(33,730	)	$	196,336
U.S. Treasury and agencies		80,073		—		(12,911	)		67,162
State and municipal		60,018		—		(9,025	)		50,993
Corporate bonds		42,909		124		(3,183	)		39,850
Total investment securities	$	413,015	$	175	$	(58,849	)	$	354,341

Summary of Unrealized Losses

The following tables present fair value and gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of the dates stated. The reference point for determining when securities are in an unrealized loss position is period-end; therefore, it is possible that a security's market value exceeded its amortized cost on other days during the past twelve-month period.

			December 31, 2023
			Less than 12 Months					12 Months or Greater					Total
(Dollars in thousands)	Number of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Mortgage backed securities		86	$	7,497	$	(45	)	$	169,474	$	(35,199	)	$	176,971	$	(35,244	)
U.S. Treasury and agencies		29		283		(1	)		68,399		(10,984	)		68,682		(10,985	)
State and municipal		65		536		(9	)		41,118		(7,348	)		41,654		(7,357	)
Corporate bonds		39		7,469		(830	)		21,683		(4,169	)		29,152		(4,999	)
Total		219	$	15,785	$	(885	)	$	300,674	$	(57,700	)	$	316,459	$	(58,585	)

			December 31, 2022
			Less than 12 Months					12 Months or Greater					Total
(Dollars in thousands)	Number of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Mortgage backed securities		78	$	39,006	$	(3,061	)	$	148,449	$	(30,669	)	$	187,455	$	(33,730	)
U.S. Treasury and agencies		28		9,904		(1,039	)		56,686		(11,872	)		66,590		(12,911	)
State and municipal		82		18,252		(2,178	)		31,530		(6,847	)		49,782		(9,025	)
Corporate bonds		33		26,018		(2,283	)		5,675		(900	)		31,693		(3,183	)
Total		221	$	93,180	$	(8,561	)	$	242,340	$	(50,288	)	$	335,520	$	(58,849	)

Summary of Investments Classified by Contractual Maturity Date

The following table presents the amortized cost and fair value of securities available for sale by contractual maturity as of the dates stated. 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.

	December 31, 2023
(Dollars in thousands)	Amortized Cost		Fair Value
Due in one year or less	$	3,210	$	3,097
Due after one year through five years		40,828		37,337
Due after five years through ten years		127,934		109,682
Due after ten years		207,682		170,965
Total	$	379,654	$	321,081