Investment Securities (Details 3) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Fair value less than 12 months	$ 158,619,000	$ 83,160,000
Unrealized losses less than 12 months	1,504,000	167,000
Fair value more than 12 months	8,718,000	0
Unrealized losses more than 12 months	99,000	0
Fair value total	167,337,000	83,160,000
Unrealized losses total	1,603,000	167,000
U. S. Government treasuries [Member]
Fair value less than 12 months	24,496,000
Unrealized losses less than 12 months	279,000
Fair value more than 12 months	0
Unrealized losses more than 12 months	0
Fair value total	24,496,000
Unrealized losses total	279,000
U. S. Government sponsored enterprises [Member]
Fair value less than 12 months	54,973,000	73,771,000
Unrealized losses less than 12 months	269,000	153,000
Fair value more than 12 months	0	0
Unrealized losses more than 12 months	0	0
Fair value total	54,973,000	73,771,000
Unrealized losses total	269,000	153,000
Securities issued by States and political subdivisions in the U.S. [Member]
Fair value less than 12 months	4,988,000
Unrealized losses less than 12 months	12,000
Fair value more than 12 months	0
Unrealized losses more than 12 months	0
Fair value total	4,988,000
Unrealized losses total	12,000
Mortgage-backed obligations of federal agencies [Member]
Fair value less than 12 months	68,183,000
Unrealized losses less than 12 months	623,000
Fair value more than 12 months	8,718,000
Unrealized losses more than 12 months	99,000
Fair value total	76,901,000
Unrealized losses total	722,000
Corporate debt security [Member]
Fair value less than 12 months	5,979,000	9,389,000
Unrealized losses less than 12 months	321,000	14,000
Fair value more than 12 months	0	0
Unrealized losses more than 12 months	0	0
Fair value total	5,979,000	9,389,000
Unrealized losses total	$ 321,000	$ 14,000