Acquisitions - Narrative (Details) - USD ($) $ in Thousands			8 Months Ended	9 Months Ended
	Jan. 21, 2022	Mar. 01, 2021	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Acquisition of a business, net of cash acquired				$ 22,793	$ 175,370
Bargain purchase gain (loss)				10,245	$ 0
Goodwill			$ 664,619	664,619		$ 671,886	$ 609,457
New Term Loan
Business Acquisition [Line Items]
Debt issuance costs		$ 4,100
Unamortized debt issuance expense		2,500
Vivial
Business Acquisition [Line Items]
Acquisition of a business, net of cash acquired	$ 22,800
Cash and cash equivalents	8,500
Current assets	27,705
Fixed and intangible assets	9,759
Deferred tax assets	13,892
Bargain purchase gain (loss)	10,200
Accounts payable assumed in business acquisition	$ 20,400
Business combination, pro forma revenue, actual			$ 72,800
Working capital adjustment				800
Adjustment in indirect tax expense credit				3,200
Change in bargain purchase gain				$ 2,900
Thryv Australia
Business Acquisition [Line Items]
Cash and cash equivalents		40,794
Deferred tax assets		34,962
Accounts payable assumed in business acquisition		15,038
Paid consideration		216,164
Transaction costs		8,700
Goodwill		64,392
Thryv Australia | New Term Loan
Business Acquisition [Line Items]
Debt issuance costs		4,200
Unamortized debt issuance expense		$ 2,500