SBA AND USDA LOAN SERVICING - Activity for SBA loan servicing rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Servicing Asset at Fair Value Roll Forward
Beginning of period	$ 16,500
End of period, fair value	19,000	$ 16,500
SBA And USDA Loan
Servicing Asset at Fair Value Roll Forward
Beginning of period	8,419	9,329	$ 8,823
Change in fair value	(257)	(910)	506
End of period, fair value	$ 8,162	$ 8,419	$ 9,329