LOANS AND ALLOWANCE FOR CREDIT LOSSES - Carrying Amounts of Loans Purchased and Sold (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Carrying Amounts of Loans Purchased and Sold
Purchases	$ 437,019
Sales	3,749
Commercial Portfolio Segment | Business Lending
Carrying Amounts of Loans Purchased and Sold
Purchases	125,288
Sales	0
Residential Portfolio Segment | Consumer Mortgage
Carrying Amounts of Loans Purchased and Sold
Purchases	271,408
Sales	3,749
Consumer Portfolio Segment | Consumer Indirect
Carrying Amounts of Loans Purchased and Sold
Purchases	9,383
Sales	0
Consumer Portfolio Segment | Consumer Direct
Carrying Amounts of Loans Purchased and Sold
Purchases	12,511
Sales	0
Consumer Portfolio Segment | Home Equity
Carrying Amounts of Loans Purchased and Sold
Purchases	18,429
Sales	$ 0