Taxes on Income (Tax Benefits) - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 2,410	$ 2,672	$ 2,936
Additions for tax positions of prior years related to acquisitions	148	0	0
Additions for tax positions of prior years	10	10	36
Lapse in statute of limitations	(83)	(218)	(252)
Foreign currency translation	(20)	(54)	(48)
Ending balance	$ 2,465	$ 2,410	$ 2,672