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v3.19.3.a.u2

Related Party Transactions (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Oct. 31, 2019
Related Party Transaction [Line Items] |  |  |  |  |
Sublease rental income |  | $ 8,965 | $ 3,671 | $ 2,797 |
Stagwell Subsidiary [Member] | Services Provided By Subisidiary [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Accounts Payable, Related Parties |  |  |  |  | $ 655
Due to Related Parties |  | $ 393 |  |  |
Other Company [Member] | Board of Directors Chairman [Member] | Subsequent Event [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Sublease rental income | $ 350 |  |  |  |

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