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Investment Securities (Tables)
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Summary Information Regarding Company's Investment Securities Classified as Available for Sale and Held to Maturity
The following table summarizes the Company’s available for sale and held to maturity investment securities at December 31, 2023 and 2022.
(dollars in thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
December 31, 2023Less Than
1 Year		Over 1
Year
Available for sale:
U.S. agency mortgage-backed$314,569 $91 $10 $30,797 $283,853 
Collateralized mortgage obligations82,764 1 — 3,503 79,262 
Municipal bonds53,891 4 3 7,218 46,674 
U.S. government agency19,151 — 117 985 18,049 
Corporate bonds6,982 — — 894 6,088 
Total available for sale$477,357 $96 $130 $43,397 $433,926 
Held to maturity:
Municipal bonds$1,065 $1 $— $— $1,066 
Total held to maturity$1,065 $1 $— $— $1,066 
(dollars in thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
December 31, 2022Less Than
1 Year		Over 1
Year
Available for sale:
U.S. agency mortgage-backed$355,014 $63 $14,828 $23,417 $316,832 
Collateralized mortgage obligations91,217 1 4,860 13 86,345 
Municipal bonds67,476 50 3,245 6,656 57,625 
U.S. government agency20,600 — 1,259 8 19,333 
Corporate bonds6,980 — 247 350 $6,383 
Total available for sale$541,287 $114 $24,439 $30,444 $486,518 
Held to maturity:
Municipal bonds$1,075 $— $3 $— $1,072 
Total held to maturity$1,075 $— $3 $— $1,072 
Summary of Company's Investment Securities With Unrealized Losses, Aggregated by Type and Length
The Company's investment securities with unrealized losses, aggregated by type and length of time that individual securities have been in a continuous loss position, are summarized in the following tables.
(dollars in thousands)Less Than 1 YearOver 1 YearTotal
December 31, 2023Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Available for sale:
U.S. agency mortgage-backed$4,033 $10 $273,128 $30,797 $277,161 $30,807 
Collateralized mortgage obligations— — 79,253 3,503 79,253 3,503 
Municipal bonds519 3 44,195 7,218 44,714 7,221 
U.S. government agency3,760 117 14,289 985 18,049 1,102 
Corporate bonds— — 6,088 894 6,088 894 
Total available for sale$8,312 $130 $416,953 $43,397 $425,265 $43,527 
Held to maturity:
Municipal bonds$— $— $— $— $— $— 
Total held to maturity$— $— $— $— $— $— 

(dollars in thousands)Less Than 1 YearOver 1 YearTotal
December 31, 2022Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Available for sale:
U.S. agency mortgage-backed$184,896 $14,828 $129,248 $23,417 $314,144 $38,245 
Collateralized mortgage obligations85,715 4,860 620 13 86,335 4,873 
Municipal bonds28,710 3,245 24,100 6,656 52,810 9,901 
U.S. government agency18,718 1,259 615 8 19,333 1,267 
Corporate bonds3,233 247 3,150 350 6,383 597 
Total available for sale$321,272 $24,439 $157,733 $30,444 $479,005 $54,883 
Held to maturity:
Municipal bonds$1,072 $3 $— $— $1,072 $3 
Total held to maturity$1,072 $3 $— $— $1,072 $3 
Summary of Debt Securities, Held-to-maturity The following tables present the amortized cost of the Company's held to maturity securities by credit quality rating at December 31, 2023 and December 31, 2022.
Credit Ratings
(dollars in thousands)AAA/AA/ABBB/BB/BTotal
December 31, 2023
Held to maturity:
Municipal bonds$1,065 $— $1,065 
Credit Ratings
(dollars in thousands)AAA/AA/ABBB/BB/BTotal
December 31, 2022
Held to maturity:
Municipal bonds$1,075 $— $1,075 
Summary of Amortized Cost and Estimated Fair Value by Maturity of Company's Investment Securities
The amortized cost and estimated fair value by maturity of the Company’s investment securities as of December 31, 2023 are shown in the following tables. Securities are classified according to their contractual maturities without consideration of principal amortization, potential prepayments or call options. The expected maturity of a security may differ from its contractual maturity because of the exercise of call options and potential paydowns. Accordingly, actual maturities may differ from contractual maturities.
(dollars in thousands)One Year or LessAfter One Year through Five YearsAfter Five Years through Ten YearsAfter Ten YearsTotal
Fair Value
Available for sale:
U.S. agency mortgage-backed$234 $76,274 $79,811 $127,534 $283,853 
Collateralized mortgage obligations430 60,299 548 17,985 79,262 
Municipal bonds— 1,754 24,584 20,336 46,674 
U.S. government agency— 5,198 12,598 253 18,049 
Corporate bonds— — 6,088 — 6,088 
Total securities available for sale$664 $143,525 $123,629 $166,108 $433,926 
Held to maturity:
Municipal bonds$— $1,066 $— $— $1,066 
Total securities held to maturity$— $1,066 $— $— $1,066 
(dollars in thousands)One Year or LessAfter One Year through Five YearsAfter Five Years through Ten YearsAfter Ten YearsTotal
Amortized Cost
Available for sale:
U.S. agency mortgage-backed$236 $82,757 $85,306 $146,270 $314,569 
Collateralized mortgage obligations432 62,779 576 18,977 82,764 
Municipal bonds— 1,889 28,161 23,841 53,891 
U.S. government agency— 5,232 13,664 255 19,151 
Corporate bonds— — 6,982 — 6,982 
Total securities available for sale$668 $152,657 $134,689 $189,343 $477,357 
Held to maturity:
Municipal bonds$— $1,065 $— $— $1,065 
Total securities held to maturity$— $1,065 $— $— $1,065