LOANS AND CREDIT QUALITY (Purchases) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Loans and Leases Receivable Disclosure [Line Items]
Outstanding balance	$ 93,055	$ 6,960	$ 210,442	$ 41,272
Purchase (discount) premium	(1,492)	(280)	(526)	(1,396)
Purchase price	91,563	6,680	209,916	39,876
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Outstanding balance	70,994	6,960	139,010	41,272
Purchase (discount) premium	(2,843)	(280)	(5,606)	(1,396)
Purchase price	68,151	6,680	133,404	39,876
U.S. Mainland Consumer - Automobile
Loans and Leases Receivable Disclosure [Line Items]
Outstanding balance	22,061	0	71,432	0
Purchase (discount) premium	1,351	0	5,080	0
Purchase price	$ 23,412	$ 0	$ 76,512	$ 0