Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Investment Securities [Abstract]
Amortized Cost and Fair Value of Investment Securities	Gross Gross Amortized unrealized unrealized Fair(dollars in thousands) cost gains losses valueDecember 31, 2021 Available-for-sale debt securities: Agency - GSE $ 119,399 $ 204 $ (2,600) $ 117,003Obligations of states and political subdivisions 360,680 6,708 (2,678) 364,710MBS - GSE residential 258,674 1,654 (3,061) 257,267 Total available-for-sale debt securities $ 738,753 $ 8,566 $ (8,339) $ 738,980 Gross Gross Amortized unrealized unrealized Fair(dollars in thousands) cost gains losses valueDecember 31, 2020 Available-for-sale debt securities: Agency - GSE $ 45,146 $ 392 $ (91) $ 45,447Obligations of states and political subdivisions 192,385 7,480 (152) 199,713MBS - GSE residential 143,557 3,881 (178) 147,260 Total available-for-sale debt securities $ 381,088 $ 11,753 $ (421) $ 392,420
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity Date	Amortized Fair(dollars in thousands) cost valueAvailable-for-sale securities: Debt securities: Due in one year or less $ 1,990 $ 2,022Due after one year through five years 13,653 13,742Due after five years through ten years 115,223 112,659Due after ten years 349,213 353,290 MBS - GSE residential 258,674 257,267 Total available-for-sale debt securities $ 738,753 $ 738,980
Schedule Of Realized Gain (Loss)	December 31,(dollars in thousands)2021 2020 2019 Gross realized gain$ 98 $ 147 $ 104Gross realized loss (52) (32) (90)Net gain$ 46 $ 115 $ 14
Available-for-Sale Securities, Continuous Unrealized Loss Position, Fair Value	Less than 12 months More than 12 months Total Fair Unrealized Fair Unrealized Fair Unrealized(dollars in thousands) value losses value losses value losses December 31, 2021 Agency - GSE $ 84,308  $ (1,460) $ 26,516  $ (1,140) $ 110,824  $ (2,600)Obligations of states and political subdivisions 193,124  (2,662) 12,796  (399) 205,920  (3,061)MBS - GSE residential 137,495  (2,351) 9,469  (327) 146,964  (2,678)Total $ 414,927  $ (6,473) $ 48,781  $ (1,866) $ 463,708  $ (8,339)Number of securities 187  26  213  December 31, 2020 Agency - GSE $ 27,602  $ (91) $ - $ - $ 27,602  $ (91)Obligations of states and political subdivisions 15,256  (152) - - 15,256  (152)MBS - GSE residential 14,753  (178) - - 14,753  (178)Total $ 57,611  $ (421) $ - $ - $ 57,611  $ (421)Number of securities 30  - 30