Securities (Tables)	6 Months Ended
Securities (Tables)	Jun. 30, 2023
Securities [Abstract]
Schedule of Available-for-sale Securities Reconciliation	June 30, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Approximate Fair Value (Dollars in thousands) Available-for-sale securities Mortgage-backed - GSE residential $ 297,941 $ 216 $ 25,224 $ 272,933 Collateralized mortgage obligations - GSE residential 10,256 - 740 9,516 State and political subdivisions 504,236 464 51,751 452,949 Corporate bonds 9,749 - 1,247 8,502 Total available-for-sale securities $ 822,182 $ 680 $ 78,962 $ 743,900 December 31, 2022 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Approximate Fair Value (Dollars in thousands) Available-for-sale securities Mortgage-backed - GSE residential $ 197,243 $ 232 $ 25,166 $ 172,309 Collateralized mortgage obligations - GSE residential 11,629 - 743 10,886 State and political subdivisions 551,007 929 57,440 494,496 Corporate bonds 9,762 - 552 9,210 Total available-for-sale securities $ 769,641 $ 1,161 $ 83,901 $ 686,901
Investments Classified by Contractual Maturity Date	June 30, 2023 Within After One to After Five to After One Year Five Years Ten Years Ten Years Total (Dollars in thousands) Available-for-sale securities Mortgage-backed - GSE residential (1) Amortized cost $ - $ 14 $ 1,053 $ 296,874 $ 297,941 Estimated fair value $ - $ 13 $ 965 $ 271,955 $ 272,933 Weighted average yield (2) - % 4.82 % 2.40 % 3.29 % 3.29 % Collateralized mortgage obligations - GSE residential (1) Amortized cost $ - $ - $ 2,296 $ 7,960 $ 10,256 Estimated fair value $ - $ - $ 2,165 $ 7,351 $ 9,516 Weighted average yield (2) - % - % 2.77 % 2.34 % 2.43 % State and political subdivisions Amortized cost $ 1,068 $ 5,900 $ 91,244 $ 406,024 $ 504,236 Estimated fair value $ 1,076 $ 5,966 $ 90,275 $ 355,632 $ 452,949 Weighted average yield (2) 3.55 % 4.32 % 3.10 % 2.72 % 2.81 % Corporate bonds Amortized cost $ - $ 144 $ 9,605 $ - $ 9,749 Estimated fair value $ - $ 140 $ 8,362 $ - $ 8,502 Weighted average yield (2) - % 4.29 % 5.70 % - % 5.68 % Total available-for-sale securities Amortized cost $ 1,068 $ 6,058 $ 104,198 $ 710,858 $ 822,182 Estimated fair value $ 1,076 $ 6,119 $ 101,767 $ 634,938 $ 743,900 Weighted average yield (2) 3.55 % 4.32 % 3.33 % 2.96 % 3.01 % Actual maturities may differ from contractual maturities because issuers may have the rights to call or prepay obligations with or without prepayment penalties. (2) Yields are calculated based on amortized cost using 30/360 day basis. Tax-exempt securities are not tax effected.
Schedule of Unrealized Loss on Investments	June 30, 2023 Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities (Dollars in thousands) Available-for-sale securities Mortgage-backed - GSE residential $ 100,527 $ 1,751 28 $ 131,007 $ 23,473 41 $ 231,534 $ 25,224 69 Collateralized mortgage obligations - GSE residential - - - 9,515 740 19 9,515 740 19 State and political subdivisions 123,696 1,366 111 275,023 50,385 195 398,719 51,751 306 Corporate bonds 4,380 621 1 4,122 626 4 8,502 1,247 5 Total temporarily impaired securities $ 228,603 $ 3,738 140 $ 419,667 $ 75,224 259 $ 648,270 $ 78,962 399 December 31, 2022 Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities (Dollars in thousands) Available-for-sale securities Mortgage-backed - GSE residential $ 91,929 $ 10,410 41 $ 66,036 $ 14,756 16 $ 157,965 $ 25,166 57 Collateralized mortgage obligations - GSE residential 10,636 733 18 251 10 1 10,887 743 19 State and political subdivisions 350,884 36,697 266 52,519 20,743 40 403,403 57,440 306 Corporate bonds 9,210 552 5 - - - 9,210 552 5 Total temporarily impaired securities $ 462,659 $ 48,392 330 $ 118,806 $ 35,509 57 $ 581,465 $ 83,901 387
Available-for-sale, Net Realized Gain	For the Three Months Ended For the Six Months Ended June 30, 2023 June 30, 2023 Gross Realized Gains Gross Realized Losses Net Realized Gain Gross Realized Gains Gross Realized Losses Net Realized Gain (Dollars in thousands) Available-for-sale securities $ 74 $ (74) $ - $ 267 $ (204) $ 63 For the Three Months Ended For the Six Months Ended June 30, 2022 June 30, 2022 Gross Realized Gains Gross Realized Losses Net Realized Loss Gross Realized Gains Gross Realized Losses Net Realized Loss (Dollars in thousands) Available-for-sale securities $ 2 $ (14) $ (12) $ 3 $ (41) $ (38)
Gain (Loss) on Securities	Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (Dollars in thousands) Net gains (losses) recognized during the reporting period on equity securities $ 6 $ (71) $ 16 $ (174) Less: net gains recognized during the reporting period on equity securities sold during the reporting period - - - - Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date $ 6 $ (71) $ 16 $ (174)