Aggregate fair value and gross unrealized loss of securities that have been in a continous unrealized loss position (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Aggregate Fair Value Gross Unrealized Loss Of Securities Less Than 12 Months Fair Value [Member]
Available-for-sale
U.S. Treasury	$ 12,155
U.S. Government Agency notes	22,137	$ 2,553
Municipal bonds	12,496	558
U.S. Government agencies and U.S. Government - sponsored enterprises	52,619	3,761
Collateralized mortgage obligations	11,554
Corporate bonds	1,742
Total temporarily impaired securities	112,703	6,872
Aggregate Fair Value Gross Unrealized Loss Of Securities Less Than 12 Months Unrealized Losses [Member]
Available-for-sale
U.S. Treasury	182
U.S. Government Agency notes	235	36
Municipal bonds	204	1
U.S. Government agencies and U.S. Government - sponsored enterprises	740	42
Collateralized mortgage obligations	185
Corporate bonds	8
Total temporarily impaired securities	1,554	79
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	2,019	20
Municipal bonds	552
U.S. Government agencies and U.S. Government - sponsored enterprises	3,195	45
Collateralized mortgage obligations
Corporate bonds
Total temporarily impaired securities	5,766	65
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	21	1
Municipal bonds
U.S. Government agencies and U.S. Government - sponsored enterprises	65	1
Collateralized mortgage obligations
Corporate bonds
Total temporarily impaired securities	86	2
Aggregate Fair Value Gross Unrealized Loss Of Securities Total Fair Value [Member]
Available-for-sale
U.S. Treasury	12,155
U.S. Government Agency notes	24,156	2,573
Municipal bonds	13,048	558
U.S. Government agencies and U.S. Government - sponsored enterprises	55,814	3,806
Collateralized mortgage obligations	11,554
Corporate bonds	1,742
Total temporarily impaired securities	118,469	6,937
Aggregate Fair Value Gross Unrealized Loss Of Securities Total Unrealized Losses [Member]
Available-for-sale
U.S. Treasury	182
U.S. Government Agency notes	256	37
Municipal bonds	204	1
U.S. Government agencies and U.S. Government - sponsored enterprises	805	43
Collateralized mortgage obligations	185
Corporate bonds	8
Total temporarily impaired securities	$ 1,640	$ 81