SUBSEQUENT EVENTS/OTHER - Additional Information (Details)	Apr. 24, 2020 USD ($) loan	Apr. 03, 2020 USD ($) shares	Mar. 02, 2019 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
SUBSEQUENT EVENTS/OTHER
Cash payments for business acquisition			$ 5,000
Total assets				$ 4,061,801,000	$ 3,941,863,000
Loans and Leases Receivable, Gross				2,603,871,000	$ 2,601,979,000
Southwest Georgia Financial Corporation
SUBSEQUENT EVENTS/OTHER
Total assets				555,300,000
Loans				391,100,000
Deposits				$ 472,900,000
Subsequent Event | Southwest Georgia Financial Corporation
SUBSEQUENT EVENTS/OTHER
Date of business acquisition		Apr. 03, 2020
Business acquisition, total consideration		$ 47,900,000
Shares issued for business acquisition | shares		2,546,967
Cash payments for business acquisition		$ 2,000
Subsequent Event | Paycheck Protection Program Loan [Member]
SUBSEQUENT EVENTS/OTHER
Number Of Loans Approved	1,660
Loans and Leases Receivable, Gross	$ 199,300,000
Number Of Loans Whose Payments Have Been Modified | loan	926
Principal Balance Of Loans Whose Payments Have Been Modified	$ 401,500,000
Percentage Of Loans Whose Payments Have Been Modified	15.00%