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Goodwill (Tables)
12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill Changes in the carrying amount of goodwill for the years ended December  31, 2021 and 2020 were as follows:
Marketing SolutionsRetail MediaTotal
(in thousands)
Balance at January 1, 2020$183,097 $134,003 $317,100 
Additions to goodwill— 2,807 2,807 
Currency translation adjustment3,286 2,612 5,898 
Balance at December 31, 2020186,383 139,422 325,805 
Additions to goodwill— 8,712 8,712 
Currency translation adjustment(2,684)(2,134)(4,818)
Balance at December 31, 2021$183,699 $146,000 $329,699