STOCKHOLDERS' EQUITY AND REGULATORY MATTERS (Details) $ in Millions	3 Months Ended
	Mar. 31, 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	$ 197.8
Summary of Regulatory Capital Ratios [Abstract]
Tier 1 Capital to average assets (CBLR), Ratio	0.1050	0.1130
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]
Summary of Regulatory Capital Ratios [Abstract]
Tier 1 Capital to average assets (CBLR), Ratio	0.1067
Citizens Deposit Bank & Trust [Member]
Summary of Regulatory Capital Ratios [Abstract]
Tier 1 Capital to average assets (CBLR), Ratio	0.0844