Aggregate fair value and gross unrealized loss of securities that have been in a continous unrealized loss position (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Aggregate Fair Value Gross Unrealized Loss Of Securities Less Than 12 Months Fair Value [Member]
Available-for-sale
U.S. Treasury	$ 19,103	$ 12,155
U.S. Government Agency notes	20,669	22,137
Municipal bonds	42,942	12,496
U.S. Government agencies and U.S. Government-sponsored enterprises	58,882	52,619
U.S. Government agencies	22,414
Corporate bonds	5,312	1,742
Total temporarily impaired securities	169,322	112,703
Aggregate Fair Value Gross Unrealized Loss Of Securities Less Than 12 Months Unrealized Losses [Member]
Available-for-sale
U.S. Treasury	1,140	182
U.S. Government Agency notes	1,159	235
Municipal bonds	3,242	204
U.S. Government agencies and U.S. Government-sponsored enterprises	2,945	740
U.S. Government agencies	1,289
Corporate bonds	188	8
Total temporarily impaired securities	9,963	1,554
Aggregate Fair Value Gross Unrealized Loss Of Securities 12 Months Or Longer Fair Value [Member]
Available-for-sale
U.S. Treasury
U.S. Government Agency notes	4,867	2,019
Municipal bonds	493	552
U.S. Government agencies and U.S. Government-sponsored enterprises	12,697	3,195
U.S. Government agencies
Corporate bonds
Total temporarily impaired securities	18,057	5,766
Aggregate Fair Value Gross Unrealized Loss Of Securities 12 Months Or Longer Unrealized Losses [Member]
Available-for-sale
U.S. Treasury
U.S. Government Agency notes	40	21
Municipal bonds	58
U.S. Government agencies and U.S. Government-sponsored enterprises	850	65
U.S. Government agencies
Corporate bonds
Total temporarily impaired securities	948	86
Aggregate Fair Value Gross Unrealized Loss Of Securities Total Fair Value [Member]
Available-for-sale
U.S. Treasury	19,103	12,155
U.S. Government Agency notes	25,536	24,156
Municipal bonds	43,435	13,048
U.S. Government agencies and U.S. Government-sponsored enterprises	71,579	55,814
U.S. Government agencies	22,414
Corporate bonds	5,312	1,742
Total temporarily impaired securities	187,379	118,469
Aggregate Fair Value Gross Unrealized Loss Of Securities Total Unrealized Losses [Member]
Available-for-sale
U.S. Treasury	1,140	182
U.S. Government Agency notes	1,199	256
Municipal bonds	3,300	204
U.S. Government agencies and U.S. Government-sponsored enterprises	3,795	805
U.S. Government agencies	1,289
Corporate bonds	188	8
Total temporarily impaired securities	$ 10,911	$ 1,640