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STOCKHOLDERS' EQUITY AND REGULATORY MATTERS (Details)
$ in Millions
6 Months Ended
Jun. 30, 2021
USD ($)
Dec. 31, 2020
Regulatory Matters [Abstract]    
Number of previous years retained profit taken for dividend calculation 2 years  
Funds available for dividends without prior approval $ 12.3  
Tier 1 capital $ 201.8  
Summary of Regulatory Capital Ratios [Abstract]    
Tier 1 Capital to average assets (CBLR), Ratio 0.1019 0.1127
Tier 1 Capital to average assets (CBLR), Regulatory Minimum Requirements, Ratio 0.0850  
Tier 1 Capital to average assets (CBLR) To Be Considered Well Capitalized, Ratio 0.0850  
Premier Bank, Inc. [Member]    
Regulatory Matters [Abstract]    
Capital conservation buffer ratio 0.0250  
Summary of Regulatory Capital Ratios [Abstract]    
Tier 1 Capital to average assets (CBLR), Ratio 0.1029  
Citizens Deposit Bank & Trust [Member]    
Regulatory Matters [Abstract]    
Capital conservation buffer ratio 0.0817  
Summary of Regulatory Capital Ratios [Abstract]    
Total Capital 0.1617  
Tier I Capital 0.1540  
Tier 1 Capital to average assets (CBLR), Ratio 0.0824