SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Deferred Revenue (Details) $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($)
Revenue Recognition
Number of primary sources for revenue recognition \| item	3
Deferred revenue recognized in revenue \| $	$ 15.1	$ 14.7

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration