MERGERS AND ACQUISITIONS AND BRANCH CONSOLIDATIONS - Summary of Consideration Paid and Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	May 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Estimated Fair Value Assets Acquired, and (Liabilities) Assumed
Goodwill		$ 19,925	$ 12,592	$ 719
Hamilton Bancorp, Inc.
Consideration
Cash	$ 14,197
Common stock issued	36,622
Total consideration transferred	50,819
Estimated Fair Value Assets Acquired, and (Liabilities) Assumed
Cash and cash equivalents	43,140
Securities available for sale	60,882
Restricted investments in bank stocks	2,658
Loans	347,361
Premises and Equipment	3,749
Core deposit intangibles	4,550
Goodwill	7,333
Cash surrender value of life insurance	17,948
Deferred tax assets, net	5,838
ROU lease asset	2,793
Other assets	3,925
Total assets acquired	500,177
Deposits	(388,246)
Borrowings	(51,393)
Other liabilities	(9,719)
Total liabilities assumed	$ (449,358)