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Other Long-Term Liabilities
 3 Months Ended
Mar. 31, 2021
Other Liabilities Disclosure [Abstract]  
Other Long-Term Liabilities OTHER LONG-TERM LIABILITIES
(in millions)March 31,
2021		December 31,
2020
Contingent consideration$8.0 $7.4 
Other11.3 7.3 
Total other long-term liabilities$19.3 $14.7 
The Company's balance of other long-term liabilities as of March 31, 2021 and December 31, 2020 consists of the Company’s portion of social security taxes that have been deferred under the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) that do not have to be deposited until December 2022, and leasehold improvements made to the Company’s new headquarters in Salt Lake City, Utah under a lease that has not yet commenced.