Discontinued Operations and Disposition of Businesses - Key Components of Income (Details) - Spinoff - J2 Cloud Services - USD ($) $ in Thousands	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]
Revenues	$ 271,571	$ 347,293	$ 339,276
Cost of revenues	74,294	100,871	94,280
Gross Profit	197,277	246,422	244,996
Operating expenses:
Sales and marketing	72,425	72,080	58,875
Research, development and engineering	16,756	15,681	14,332
General and administrative	84,213	118,608	123,812
Goodwill impairment on business	32,629	0	0
Total operating expense	206,023	206,369	197,019
(Loss) income from discontinued operations	(8,746)	40,053	47,977
Interest expense	(235)	(939)	(1,015)
Interest income	693	963	467
(Loss) gain on sale of businesses	(21,797)	17,122	0
Other income (expense)	1,752		103
Other income (expense)		(1,606)
(Loss) income from discontinued operations before income taxes	(28,333)	55,593	47,532
Income tax (benefit) expense	(16,160)	25,093	13,448
(Loss) income from discontinued operations, net of income taxes	$ (12,173)	$ 30,500	$ 34,084