Restructuring Charge (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring charge :
Employee termination costs	$ 1,594	$ 4,517	$ 8,958
Impairment of intangible assets		1,070
Facility closure and consolidation charge (recovery)	105	2,919	3,416
Total restructuring charge	1,699	8,506	12,374
Capital Markets [Member]
Restructuring charge :
Employee termination costs		4,179	4,951
Impairment of intangible assets		1,070
Facility closure and consolidation charge (recovery)	(4)	3,129	2,904
Total restructuring charge	(4)	8,378	7,855
Principal Investments - United Online and magicJack [Member]
Restructuring charge :
Employee termination costs	1,594	338	723
Impairment of intangible assets
Facility closure and consolidation charge (recovery)	109
Total restructuring charge	1,703	338	723
Corporate [Member]
Restructuring charge :
Employee termination costs			3,284
Impairment of intangible assets
Facility closure and consolidation charge (recovery)		(210)	512
Total restructuring charge		$ (210)	$ 3,796