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LEASES (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2021 USD ($) ft² | May 31, 2021 USD ($) ft² | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Leases |  |  |  |  |
Options to renew |  |  | true |  |
Minimum lease payments |  |  | $ 144.8 | $ 144.6 |
Option to terminate period |  |  | 1 year |  |
Additional right of use assets |  |  | $ 14.1 |  |
Additional operating lease liabilities |  |  | $ 14.1 |  |
Minimum |  |  |  |  |
Leases |  |  |  |  |
Initial term |  |  | 1 year |  |
Renewal term |  |  | 1 year |  |
Maximum |  |  |  |  |
Leases |  |  |  |  |
Initial term |  |  | 5 years |  |
Renewal term |  |  | 5 years |  |
Option to terminate period |  |  | 1 year |  |
Acquisitions |  |  |  |  |
Leases |  |  |  |  |
Additional right of use assets |  |  | $ 0.9 |  |
Technology support services |  |  |  |  |
Leases |  |  |  |  |
Rent expense |  |  | $ 25.6 | $ 20.2 | $ 12.4
Office space In London |  |  |  |  |
Leases |  |  |  |  |
Minimum lease payments |  | $ 9.5 |  |  |
Area of office space leased | ft² |  | 21,000 |  |  |
Initial term of lease |  | 69 months |  |  |
Renewal Term |  | 60 months |  |  |
Office space in Amsterdam |  |  |  |  |
Leases |  |  |  |  |
Minimum lease payments | $ 9.2 |  |  |  |
Area of office space leased | ft² | 29,500 |  |  |  |
Initial term of lease | 120 months |  |  |  |
Renewal Term | 60 months |  |  |  |

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