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Schedule of Available-for-sale Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Investment Holdings [Line Items]    
Amortized cost $ 370,688 $ 284,758
Gross unrealized gains 8,456 12,542
Gross unrealized losses (626) (30)
Estimated fair value 378,518 297,270
US Treasury Securities [Member]    
Investment Holdings [Line Items]    
Amortized cost 40,397 2,000
Gross unrealized gains 11 37
Gross unrealized losses (94)
Estimated fair value 40,314 2,037
U.S. Federal Agency Obligations [Member]    
Investment Holdings [Line Items]    
Amortized cost 17,211 18,804
Gross unrealized gains 95 138
Gross unrealized losses (9) (18)
Estimated fair value 17,297 18,924
Municipal Obligations, Tax Exempt [Member]    
Investment Holdings [Line Items]    
Amortized cost 135,818 136,321
Gross unrealized gains 4,999 6,367
Gross unrealized losses (29) (12)
Estimated fair value 140,788 142,676
Municipal Obligations, Taxable [Member]    
Investment Holdings [Line Items]    
Amortized cost 37,599 46,643
Gross unrealized gains 1,447 2,892
Gross unrealized losses (58)
Estimated fair value 38,988 49,535
Agency Mortgage-backed Securities [Member]    
Investment Holdings [Line Items]    
Amortized cost 132,034 75,530
Gross unrealized gains 1,904 3,108
Gross unrealized losses (436)
Estimated fair value 133,502 78,638
Certificates of Deposit [Member]    
Investment Holdings [Line Items]    
Amortized cost 7,629 5,460
Gross unrealized gains
Gross unrealized losses
Estimated fair value $ 7,629 $ 5,460