Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Principles of Consolidation and Recent Events (Details)

v3.22.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Principles of Consolidation and Recent Events (Details)
 12 Months Ended
Jul. 07, 2021
USD ($)
Dec. 31, 2021
USD ($)
Loan
Branch
Dec. 31, 2020
USD ($)
Loan
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]      
Number of full service branch offices | Branch   26  
Recent Events [Abstract]      
Aggregate number of loan modifications made by other than troubled debt restructurings | Loan   726  
Aggregate amount of loan modifications made by other than troubled debt restructurings, aggregate principal balances   $ 337,200,000  
Interest-Only Modifications [Member]      
Recent Events [Abstract]      
Aggregate number of loan modifications made by other than troubled debt restructurings | Loan   726  
Aggregate amount of loan modifications made by other than troubled debt restructurings, aggregate principal balances   $ 337,200,000  
PPP Loans [Member]      
Recent Events [Abstract]      
Number of loans originated | Loan   1,000 1,738
Loans originated   $ 128,100,000 $ 346,700,000
Fees generated for loans originated   $ 5,600,000 $ 10,000,000.0
Number of loans forgiven | Loan   1,722 765
Loans forgiven   $ 318,400,000 $ 113,500,000
Net fees recognized for loans forgiven   $ 8,300,000 $ 5,400,000
Number of loans outstanding | Loan   240  
Loans outstanding   $ 43,200,000  
Net fees unrecognized for loans   $ 1,300,000  
PPP Loans [Member] | Minimum [Member]      
Recent Events [Abstract]      
Contractual period   24 months  
PPP Loans [Member] | Maximum [Member]      
Recent Events [Abstract]      
Contractual period   60 months  
Macatawa Statutory Trust II [Member] | Common Securities [Member]      
Recent Events [Abstract]      
Trust securities redeemed $ 619,000    
Common securities repurchased 619,000    
Trusted Preferred Securities [Member] | Macatawa Statutory Trust II [Member]      
Recent Events [Abstract]      
Trust securities redeemed $ 20,000,000.0