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Regulatory Capital (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Parent Company [Member]    
Total Capital    
Total Capital $ 72,148 $ 67,155
Total Capital (to risk-weighted assets) ratio 13.80% 13.90%
Minimum amount of capital for adequacy purposes $ 41,811 $ 38,761
Minimum amount of capital for adequacy purposes, ratio 8.00% 8.00%
Common equity Tier 1 capital (to risk weighted assets)    
Common equity Capital $ 67,481 $ 62,584
Common equity Capital ratio 12.90% 12.90%
Minimum amount of Common equity Capital for adequacy purposes $ 23,519 $ 21,803
Minimum amount of Common equity Capital for adequacy purposes, ratio 4.50% 4.50%
Tier 1 Capital (to risk-weighted assets)    
Tier 1 Capital $ 67,481 $ 62,584
Tier 1 Capital (to risk-weighted assets) ratio 12.90% 12.90%
Minimum amount of Tier 1 Capital for adequacy purposes $ 31,359 $ 29,071
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 6.00% 6.00%
Tier 1 Leverage Capital (to average assets)    
Tier 1 Capital $ 67,481 $ 62,584
Tier 1 Capital (to average assets) ratio 10.50% 9.90%
Minimum amount of Tier 1 Capital for adequacy purposes $ 25,658 $ 25,301
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 4.00% 4.00%
ChoiceOne Bank [Member]    
Total Capital    
Total Capital $ 66,976 $ 62,393
Total Capital (to risk-weighted assets) ratio 12.90% 12.90%
Minimum amount of capital for adequacy purposes $ 41,599 $ 38,555
Minimum amount of capital for adequacy purposes, ratio 8.00% 8.00%
Minimum Capital required to be well-capitalized $ 51,999 $ 48,194
Minimum Capital required to be well-capitalized, ratio 10.00% 10.00%
Common equity Tier 1 capital (to risk weighted assets)    
Common equity Capital $ 62,309 $ 57,822
Common equity Capital ratio 12.00% 12.00%
Minimum amount of Common equity Capital for adequacy purposes $ 23,399 $ 21,687
Minimum amount of Common equity Capital for adequacy purposes, ratio 4.50% 4.50%
Minimum Common equity Capital required to be well-capitalized $ 33,799 $ 31,326
Minimum Common equity Capital required to be well-capitalized, ratio 6.50% 6.50%
Tier 1 Capital (to risk-weighted assets)    
Tier 1 Capital $ 62,309 $ 57,822
Tier 1 Capital (to risk-weighted assets) ratio 12.00% 12.00%
Minimum amount of Tier 1 Capital for adequacy purposes $ 31,199 $ 28,917
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 6.00% 6.00%
Minimum Tier 1 Capital required to be well-capitalized $ 41,599 $ 38,555
Minimum Tier 1 Capital required to be well-capitalized, ratio 8.00% 8.00%
Tier 1 Leverage Capital (to average assets)    
Tier 1 Capital $ 62,309 $ 57,822
Tier 1 Capital (to average assets) ratio 9.80% 9.20%
Minimum amount of Tier 1 Capital for adequacy purposes $ 25,512 $ 25,156
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 4.00% 4.00%
Minimum Tier 1 Capital required to be well-capitalized $ 31,890 $ 31,445
Minimum Tier 1 Capital required to be well-capitalized, ratio 5.00% 5.00%