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Business Combinations - Additional Information (Details)
 3 Months Ended
Mar. 01, 2025
USD ($)
Loan
shares
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Business Acquisition [Line Items]      
Acquisition related expense   $ 12,000,000  
Provision for credit losses on acquired loans   9,500,000  
Intangible amortization   680,000 $ 203,000
Fair value on acquired loans   1,600,000 2,400,000
Business acquisitions adjustment to net income loss after tax   $ 433,000 649,000
Fentura Financial, Inc. [Member]      
Business Acquisition [Line Items]      
Business acquisition description   On March 1, 2025, ChoiceOne completed the Merger, in an all stock transaction, of Fentura, the former parent company of The State Bank, with and into ChoiceOne, with ChoiceOne surviving the Merger.  
Reason for business combination   The primary reason for the Merger was to expand ChoiceOne's market presence and enhance its financial strength by integrating Fentura's substantial customer base.  
Number of branch offices | Loan 20    
Number of loan production offices | Loan 1    
Total assets $ 1,751,629,000    
Total loans 1,400,000,000    
Total deposits $ 1,431,881,000    
Number of shares issued (in shares) | shares 6,070,836    
Consideration $ 192,992,000    
Acquisition related expense   $ 13,800,000  
Intangible amortization   $ 1,100,000 $ 1,600,000