Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring Charge (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Charge (Textual)
Restructuring charges	$ 1,699	$ 8,506	$ 12,374
Revised restructuring charge			11,651
Severance costs			2,400
Accelerated vesting of restricted stock awards			1,710
Severance costs			3,241
Lease loss accruals and impairments			3,416
Capital Markets segment [Member]
Restructuring Charge (Textual)
Restructuring charges	(4)	8,378	7,855
Principal Investments - United Online And magicJack [Member]
Restructuring Charge (Textual)
Restructuring charges	1,703	338	723
Corporate [Member]
Restructuring Charge (Textual)
Restructuring charges		$ (210)	3,796
Former Corporate Executives [Member]
Restructuring Charge (Textual)
Accelerated vesting of restricted stock awards			$ 884