ALLOWANCE FOR CREDIT LOSSES - Past due percentages (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financial Asset, Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percentage of gross financing receivable	100.00%	100.00%
Financial Asset, Current
Financing Receivable, Past Due [Line Items]
Percentage of gross financing receivable	91.70%	92.30%
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percentage of gross financing receivable	2.70%	3.40%
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percentage of gross financing receivable	1.50%	1.60%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percentage of gross financing receivable	4.10%	2.70%