SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cloud Computing Arrangement Implementation Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Hosting Arrangement, Service Contract, Description	The implementation costs incurred for setup fees in a hosting arrangement that is a service contract should be presented as a prepaid asset in the balance sheet and expensed over the term of the hosting arrangement to the same line item in the statement of income as the costs related to the hosting fees, with costs incurred for integration with on premise software being capitalized as intangible assets and being amortized over the term of the arrangement.
CCA implementation costs	$ 622