SECURITIES - Schedule of Available For Sale of Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Securities with unrealized losses [Abstract]
Less than 12 months, Fair Value	$ 262,713	$ 26,724
12 months or more, Fair value		3,112
Total Fair value	262,713	29,836
Less than 12 Months, Unrealized Losses	6,491	89
12 Months or more, Unrealized Losses		17
Total Unrealized Losses	6,491	106
U.S. government sponsored agencies
Securities with unrealized losses [Abstract]
Less than 12 months, Fair Value	34,890	19,800
12 months or more, Fair value	0	0
Total Fair value	34,890	19,800
Less than 12 Months, Unrealized Losses	1,260	61
12 Months or more, Unrealized Losses	0	0
Total Unrealized Losses	1,260	61
Mortgage-backed securities residential [Member]
Securities with unrealized losses [Abstract]
Less than 12 months, Fair Value	161,631	3
12 months or more, Fair value	0	3,112
Total Fair value	161,631	3,115
Less than 12 Months, Unrealized Losses	4,239	0
12 Months or more, Unrealized Losses	0	17
Total Unrealized Losses	4,239	17
Mortgage-backed securities commercial [Member]
Securities with unrealized losses [Abstract]
Less than 12 months, Fair Value	2,567	0
12 months or more, Fair value	0	0
Total Fair value	2,567	0
Less than 12 Months, Unrealized Losses	2	0
12 Months or more, Unrealized Losses	0	0
Total Unrealized Losses	2	$ 0
State and Municipal Securities [Member]
Securities with unrealized losses [Abstract]
Less than 12 months, Fair Value	63,625		$ 6,921
12 months or more, Fair value	0		0
Total Fair value	63,625		6,921
Less than 12 Months, Unrealized Losses	990		28
12 Months or more, Unrealized Losses	0		0
Total Unrealized Losses	$ 990		$ 28