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Securities, Securities in Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Securities [Abstract]    
Percentage of total investment with unrealized losses 16.20% 42.80%
Available-for-sale, amortized cost [Abstract]    
Less than 12 months $ 87,261 $ 85,046
12 months or more 75,247 173,948
Total 162,508 258,994
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (375) (561)
12 months or more (411) (1,400)
Total (786) (1,961)
Available-for-sale, fair value [Abstract]    
Less than 12 months 86,886 84,485
12 months or more 74,836 172,548
Total 161,722 257,033
U.S. Treasury and Government Agencies [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 5,604 25,955
12 months or more 46,163 82,339
Total 51,767 108,294
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (7) (148)
12 months or more (190) (428)
Total (197) (576)
Available-for-sale, fair value [Abstract]    
Less than 12 months 5,597 25,807
12 months or more 45,973 81,911
Total 51,570 107,718
State and Political Subdivisions [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 534 8,356
12 months or more 0 0
Total 534 8,356
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (3) (37)
12 months or more 0 0
Total (3) (37)
Available-for-sale, fair value [Abstract]    
Less than 12 months 531 8,319
12 months or more 0 0
Total 531 8,319
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 58,463 19,317
12 months or more 2,801 91,609
Total 61,264 110,926
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (336) (100)
12 months or more (42) (972)
Total (378) (1,072)
Available-for-sale, fair value [Abstract]    
Less than 12 months 58,127 19,217
12 months or more 2,759 90,637
Total 60,886 109,854
Other Debt Securities [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 22,660 31,418
12 months or more 26,283 0
Total 48,943 31,418
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (29) (276)
12 months or more (179) 0
Total (208) (276)
Available-for-sale, fair value [Abstract]    
Less than 12 months 22,631 31,142
12 months or more 26,104 0
Total $ 48,735 $ 31,142