BUSINESS COMBINATIONS - Carrying Amount of Loans (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2022	Dec. 31, 2020
Business Acquisition [Line Items]
Total purchase credit deteriorated (PCD) loans acquired		$ 100
BMBC
Business Acquisition [Line Items]
Book balance of loans at acquisition	$ 235,791
Allowance for credit losses at acquisition	(26,103)
Non-credit related discount	(1,421)
Total purchase credit deteriorated (PCD) loans acquired	$ 208,267