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Regulatory Capital (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Parent Company [Member]    
Total Capital    
Total Capital $ 135,836 $ 72,148
Total Capital (to risk-weighted assets) ratio 14.20% 13.80%
Minimum amount of capital for adequacy purposes $ 76,288 $ 41,811
Minimum amount of capital for adequacy purposes, ratio 8.00% 8.00%
Common equity Tier 1 capital (to risk weighted assets)    
Common equity Capital $ 131,785 $ 67,481
Common equity Capital ratio 13.80% 12.90%
Minimum amount of Common equity Capital for adequacy purposes $ 42,912 $ 23,519
Minimum amount of Common equity Capital for adequacy purposes, ratio 4.50% 4.50%
Tier 1 Capital (to risk-weighted assets)    
Tier 1 Capital $ 131,785 $ 67,481
Tier 1 Capital (to risk-weighted assets) ratio 13.80% 12.90%
Minimum amount of Tier 1 Capital for adequacy purposes $ 57,216 $ 31,359
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 6.00% 6.00%
Tier 1 Leverage Capital (to average assets)    
Tier 1 Capital $ 131,785 $ 67,481
Tier 1 Capital (to average assets) ratio 9.60% 10.50%
Minimum amount of Tier 1 Capital for adequacy purposes $ 54,646 $ 25,658
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 4.00% 4.00%
ChoiceOne Bank [Member]    
Total Capital    
Total Capital $ 69,412 $ 66,976
Total Capital (to risk-weighted assets) ratio 13.20% 12.90%
Minimum amount of capital for adequacy purposes $ 42,039 $ 41,599
Minimum amount of capital for adequacy purposes, ratio 8.00% 8.00%
Minimum Capital required to be well-capitalized $ 52,549 $ 51,999
Minimum Capital required to be well-capitalized, ratio 10.00% 10.00%
Common equity Tier 1 capital (to risk weighted assets)    
Common equity Capital $ 65,362 $ 62,309
Common equity Capital ratio 12.40% 12.00%
Minimum amount of Common equity Capital for adequacy purposes $ 23,647 $ 23,399
Minimum amount of Common equity Capital for adequacy purposes, ratio 4.50% 4.50%
Minimum Common equity Capital required to be well-capitalized $ 34,157 $ 33,799
Minimum Common equity Capital required to be well-capitalized, ratio 6.50% 6.50%
Tier 1 Capital (to risk-weighted assets)    
Tier 1 Capital $ 65,362 $ 62,309
Tier 1 Capital (to risk-weighted assets) ratio 12.40% 12.00%
Minimum amount of Tier 1 Capital for adequacy purposes $ 31,530 $ 31,199
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 6.00% 6.00%
Minimum Tier 1 Capital required to be well-capitalized $ 42,039 $ 41,599
Minimum Tier 1 Capital required to be well-capitalized, ratio 8.00% 8.00%
Tier 1 Leverage Capital (to average assets)    
Tier 1 Capital $ 65,362 $ 62,309
Tier 1 Capital (to average assets) ratio 10.00% 9.80%
Minimum amount of Tier 1 Capital for adequacy purposes $ 26,179 $ 25,512
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 4.00% 4.00%
Minimum Tier 1 Capital required to be well-capitalized $ 32,724 $ 31,890
Minimum Tier 1 Capital required to be well-capitalized, ratio 5.00% 5.00%
Lakestone Bank & Trust [Member]    
Total Capital    
Total Capital $ 63,885  
Total Capital (to risk-weighted assets) ratio 15.00%  
Minimum amount of capital for adequacy purposes $ 34,056  
Minimum amount of capital for adequacy purposes, ratio 8.00%  
Minimum Capital required to be well-capitalized $ 42,570  
Minimum Capital required to be well-capitalized, ratio 10.00%  
Common equity Tier 1 capital (to risk weighted assets)    
Common equity Capital $ 63,885  
Common equity Capital ratio 15.00%  
Minimum amount of Common equity Capital for adequacy purposes $ 19,156  
Minimum amount of Common equity Capital for adequacy purposes, ratio 4.50%  
Minimum Common equity Capital required to be well-capitalized $ 27,670  
Minimum Common equity Capital required to be well-capitalized, ratio 6.50%  
Tier 1 Capital (to risk-weighted assets)    
Tier 1 Capital $ 63,885  
Tier 1 Capital (to risk-weighted assets) ratio 15.00%  
Minimum amount of Tier 1 Capital for adequacy purposes $ 25,542  
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 6.00%  
Minimum Tier 1 Capital required to be well-capitalized $ 34,056  
Minimum Tier 1 Capital required to be well-capitalized, ratio 8.00%  
Tier 1 Leverage Capital (to average assets)    
Tier 1 Capital $ 63,885  
Tier 1 Capital (to average assets) ratio 9.00%  
Minimum amount of Tier 1 Capital for adequacy purposes $ 28,338  
Minimum amount of Tier 1 Capital for adequacy purposes, ratio 4.00%  
Minimum Tier 1 Capital required to be well-capitalized $ 35,423  
Minimum Tier 1 Capital required to be well-capitalized, ratio 5.00%