Allowance for Credit Losses - Allowance for Credit Loss Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 33,368	$ 26,828	$ 22,571
Thryv Australia Acquisition, balance as of March 1, 2021	2,733	0	0
Additions	8,031	32,077	30,092
Deductions	(26,657)	(25,537)	(25,835)
Ending balance	17,475	33,368	$ 26,828
Accounts receivable, allowance for credit loss	17,400	33,000
Contract with customer, asset, allowance for credit loss	$ 100	$ 300