Cover - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 24, 2021
Cover [Abstract]
Document Type	10-K
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	001-35895
Entity Registrant Name	THRYV HOLDINGS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-2740040
Entity Address, Address Line One	2200 West Airfield Drive, P.O. Box 619810
Entity Address, City or Town	D/FW Airport
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75261
City Area Code	(972)
Local Phone Number	453-7000
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	THRY
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		33,127,667
Entity Central Index Key	0001556739
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Documents Incorporated by Reference	Certain portions of the registrant's definitive proxy statement for its annual meeting of stockholders, to be filed with the Securities and Exchange Commission within 120 days after the end of the registrant's fiscal year ended December 31, 2020, are incorporated herein by reference.
Entity Public Float	$ 0
Document Annual Report	true
Security Exchange Name	NASDAQ