SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2021
Minimum
Intangible Assets
Estimated economic lives	1 year
Maximum
Intangible Assets
Estimated economic lives	60 years
Permits and license | Minimum
Intangible Assets
Renewal terms of acquired intangible assets	5 years
Permits and license | Maximum
Intangible Assets
Renewal terms of acquired intangible assets	10 years