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Goodwill and Intangible Assets - Narrative (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
Mar. 31, 2024
reporting_unit
Dec. 31, 2024
USD ($)
reporting_unit
Dec. 31, 2023
USD ($)
reporting_unit
Dec. 31, 2022
USD ($)
Goodwill [Line Items]          
Goodwill     $ 253,318,000 $ 302,400,000 $ 566,004,000
Goodwill, accumulated impairment loss     1,166,700,000 $ 1,083,600,000  
Goodwill, tax deductible amount     $ 28,700,000    
Number of reporting units | reporting_unit   2 2 4  
Goodwill, impairment loss     $ 83,094,000 $ 268,800,000  
Intangible assets, net     34,259,000 18,788,000  
Amortization expense     16,000,000 25,500,000 51,500,000
Thryv Marketing Services          
Goodwill [Line Items]          
Goodwill $ 0   0 83,516,000 347,120,000
Goodwill, impairment loss $ 83,100,000   $ 83,094,000 $ 268,800,000 $ 102,000,000.0