Aggregate fair value and gross unrealized loss of securities that have been in a continous unrealized loss position (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Aggregate Fair Value Gross Unrealized Loss Of Securities Less Than 12 Months Fair Value [Member]
Available-for-sale
U.S. Treasury		$ 6,435
U.S. Government Agency notes	2,839	3,106
Municipal bonds	8,334	37,277
U.S. Government agencies and U.S. Government - sponsored enterprises	4,826	18,861
U.S. Government agencies	2,648
Corporate bonds	7,892	11,251
Total temporarily impaired securities	26,539	91,263
Aggregate Fair Value Gross Unrealized Loss Of Securities Less Than 12 Months Unrealized Losses [Member]
Available-for-sale
U.S. Treasury		484
U.S. Government Agency notes	123	158
Municipal bonds	326	5,950
U.S. Government agencies and U.S. Government - sponsored enterprises	8	1,559
U.S. Government agencies	191
Corporate bonds	858	1,249
Total temporarily impaired securities	1,506	11,182
Aggregate Fair Value Gross Unrealized Loss Of Securities 12 Months Or Longer Fair Value [Member]
Available-for-sale
U.S. Treasury	17,479	10,698
U.S. Government Agency notes	18,567	17,467
Municipal bonds	39,864	9,261
U.S. Government agencies and U.S. Government - sponsored enterprises	53,266	39,909
U.S. Government agencies	19,267
Corporate bonds	4,719	1,523
Total temporarily impaired securities	153,162	86,461
Aggregate Fair Value Gross Unrealized Loss Of Securities 12 Months Or Longer Unrealized Losses [Member]
Available-for-sale
U.S. Treasury	1,820	1,666
U.S. Government Agency notes	2,108	2,478
Municipal bonds	6,574	2,691
U.S. Government agencies and U.S. Government - sponsored enterprises	7,265	6,452
U.S. Government agencies	2,848
Corporate bonds	781	227
Total temporarily impaired securities	21,396	15,166
Aggregate Fair Value Gross Unrealized Loss Of Securities Total Fair Value [Member]
Available-for-sale
U.S. Treasury	17,479	17,133
U.S. Government Agency notes	21,406	20,573
Municipal bonds	48,198	46,538
U.S. Government agencies and U.S. Government - sponsored enterprises	58,092	58,770
U.S. Government agencies	21,915
Corporate bonds	12,611	12,774
Total temporarily impaired securities	179,701	177,724
Aggregate Fair Value Gross Unrealized Loss Of Securities Total Unrealized Losses [Member]
Available-for-sale
U.S. Treasury	1,820	2,150
U.S. Government Agency notes	2,231	2,636
Municipal bonds	6,900	8,641
U.S. Government agencies and U.S. Government - sponsored enterprises	7,273	8,011
U.S. Government agencies	3,039
Corporate bonds	1,639	1,476
Total temporarily impaired securities	$ 22,902	$ 26,348