Contingent Liabilities	12 Months Ended
Contingent Liabilities	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	Contingent Liabilities Litigation The Company is subject to various lawsuits and other claims in the normal course of business. In addition, from time to time, the Company receives communications from government or regulatory agencies concerning investigations or allegations of noncompliance with laws or regulations in jurisdictions in which the Company operates. The Company establishes reserves for the estimated losses on specific contingent liabilities, for regulatory and legal actions where the Company deems a loss to be probable and the amount of the loss can be reasonably estimated. In other instances, the Company is not able to make a reasonable estimate of liability because of the uncertainties related to the outcome or the amount or range of potential loss. The Company does not expect that the ultimate resolution of pending regulatory and legal matters in future periods will have a material adverse effect on the Company's consolidated statements of operations, balance sheets or cash flows. New York Tax Cases: There are two matters; one case involving the period December 1, 2009, through May 31, 2012 (the “First Case”), and another case involving the period June 1, 2012, through May 31, 2016 (the “Second Case”). The issue in both matters is whether the hand delivery of the Company's telephone directories by Product Development Corporation (“PDC”) and Directory Distributing Associates, Inc. (“DDA”) in New York constitutes causing the directories to be mailed or shipped “by means of a common carrier, United States postal service or like delivery service” pursuant to Tax Law Section 1115(n)(4). If so, then no tax would be due as an exemption from tax would apply. The Company previously successfully litigated this issue for Verizon Yellow Pages Company and the Division of Taxation did not appeal the Administrative Law Judge's (“ALJ”) determination. The Division, however, subsequently litigated the issue against another taxpayer, Yellow Book, and was successful. On May 25, 2017, the Administrative Law Judge issued a Determination in the New York tax appeal and upheld the Notice of Determination issued by the Division of Taxation in the First Case. The Division asserted that $3.2 million of tax and interest is due for the period December 1, 2009 through May 31, 2012. In the Determination, the ALJ concluded that “PDC and DDA were not acting as common carriers in their delivery of the directories but were acting as contract carriers.” The Company subsequently filed an Exception with the Tax Appeals Tribunal (which reviews ALJ Determinations based on the record made before the ALJ). The Tax Appeals Tribunal issued an adverse ruling on or about September 20, 2018. The Company filed an appeal with the Appellate Division on January 17, 2019, and the Commissioner filed an answer in February 2019. In connection with the appeal, the Company paid $5.1 million to the State of New York for the tax assessed plus interest. The New York Supreme Court, Appellate Division, heard arguments in the sales tax appeal on January 16, 2020 and issued a ruling on February 27, 2020, affirming the determination against the Company. The Company filed the Motion for Leave to Appeal the Appellate Division’s ruling on or about May 7, 2020 and the motion was denied on September 10, 2020. The Company previously appealed the Division’s Notice of Determination for the Second Case, in which the Division has asserted that an additional $3.3 million of tax and interest is due. The ALJ approved a stipulation between the Company and the Division under which the parties agreed that the outcome of the ultimate decision in the First Case will be binding on the parties with respect to the Second Case. In light of the Appellate Division’s denial of the Motion for Leave to Appeal, Thryv will pay past taxes and interest that are due after the State provides it with updated interest amounts. The total combined exposure of both cases is approximately $8.7 million, inclusive of the $5.1 million payment that is referenced above, leaving an additional unpaid balance of $3.5 million which is accrued on the Company's consolidated balance sheet as of December 31, 2020. The Company paid the balance of $3.5 million in January of 2021. Section 199 and Research and Development Tax Case: Section 199 of the Tax Code provides for deductions for manufacturing performed in the U.S. The government has taken the position that directory providers are not entitled to take advantage of the deductions because printing vendors are already taking deductions and only one taxpayer can claim the deduction. The Tax Code also grants tax credits related to research and development expenditures. The government took the position that the expenditures have not been sufficiently documented to be eligible for the tax credit. The Company disagrees with these positions. The government has challenged the Company's positions. With respect to the tax years 2012 through June 2015 for the YP LLC partnership, the government sent 90-day notices to DexYP on August 29, 2018. In response, the Company filed three petitions (in the names of various related partners) in U.S. Tax Court, and the IRS filed answers to those petitions. The three cases were consolidated by the court and were referred back to IRS Administrative Appeals for settlement negotiations, during which time the litigation is suspended. The appeals conference for YP will likely occur in the second quarter of 2021. In advance of the IRS Appeals conference, the parties did reach an agreement regarding additional research and development tax credits for the tax years at issue whereby the IRS will allow more tax credits than were originally claimed on the tax returns. With respect to the tax year from July to December 2015 for the Print Media LLC partnership, the Company was recently unsuccessful in its attempt to negotiate a settlement with IRS Appeals, and the government has issued a 90 day notice to the Company. The Company will file a petition in the Tax Court to challenge the government’s denial. As of December 31, 2020, and December 31, 2019, the Company has reserved approximately $31.9 million and $46.0 million in connection with the 199 disallowance and $0.2 million and $7.1 million related to the research and development tax credit disallowance, respectively. The decrease in the reserve balance is primarily attributable to a partial release of uncertain tax positions due to favorable developments with ongoing U.S. federal tax examinations. Pursuant to the acquisition transaction whereby the Company acquired certain entities from the YP Acquisition, the Company is entitled to (i) a dollar for dollar indemnification for the research and development tax liability, and (ii) a dollar for dollar indemnification for the 199-tax liability after the Company pays the first $8.0 million in liability. The indemnification, however, is subject to a provision in the YP Acquisition agreement that limits the seller’s liability to certain stock that was escrowed in connection with the YP Acquisition. The value of that escrowed stock is estimated to be approximately $24.3 million and $29.8 million as of December 31, 2020 and December 31, 2019, respectively. Other Texas Sales, Excise, and Use Tax Audit: We conduct operations in many tax jurisdictions. In many jurisdictions, non-income-based taxes, such as sales and use tax and other indirect taxes, are assessed on our operations. Although we are diligent in collecting and remitting such taxes, there is uncertainty as to how each taxing jurisdiction will ultimately classify the Company's digital products and services for sales and use tax purposes. On June 24, 2020, the Texas Comptroller of Public Accounts issued a notice to the Company assigning a routine audit of the Company's sales, excise, and use tax account. The Company has reserved $2.7 million for the total combined exposure for the periods open to audit examination, which is accrued on the Company's consolidated balance sheet as of December 31, 2020. New York Sales, Excise, and Use Tax Audit: On August 19, 2020, the New York State Department of Taxation and Finance issued a notice to the Company assigning a routine audit of the Company's sales, excise, and use tax account for the audit period covering March 1, 2017 through May 31, 2020. The Company has reserved $2.7 million for the total combined exposure for the respective period, which is accrued on the Company's consolidated balance sheet as of December 31, 2020.