Discontinued Operations and Disposition of Businesses - Key Components of Cash Flows (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency remeasurement loss (gain)	$ 181,000	$ (35,142,000)	$ 0
Lease asset impairments and other charges	9,149,000	0	0
Loss (gain) on sale of businesses	21,797,000	(17,122,000)	0
Goodwill impairment on business	32,629,000	0	0
Spinoff | J2 Cloud Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization	39,727,000	67,995,000	70,700,000
Capital expenditure	14,322,000	19,633,000	15,229,000
Share-based compensation expense	602,000	4,138,000	2,711,000
Non-cash operating lease costs	2,814,000	4,364,000	5,454,000
Deferred taxes	554,000	7,723,000	(193,000)
Foreign currency remeasurement loss (gain)	(9,000)	3,574,000	1,420,000
Lease asset impairments and other charges	990,000	0	0
Loss (gain) on sale of businesses	21,797,000	(17,122,000)	0
Goodwill impairment on business	$ 32,629,000	$ 0	$ 0