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SIGNIFICANT ACCOUNTING POLICIES - Goodwill and Other Intangible Assets (Details)
 12 Months Ended
Dec. 31, 2021
Goodwill and Other Intangible Assets  
Estimated useful life 15 years
Capitalized software costs | Minimum  
Goodwill and Other Intangible Assets  
Estimated useful life 3 years
Capitalized software costs | Maximum  
Goodwill and Other Intangible Assets  
Estimated useful life 15 years