Taxes on Income (Tax Benefits) - Valuation Allowance Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Balance, at beginning of year	$ 19,353	$ 7,797	$ 6,574
Additions	7,783	14,442	1,754
Reversals	(5,294)	(2,090)	(131)
Other adjustments	(2,945)	(796)	(400)
Balance, at end of year	$ 18,897	$ 19,353	$ 7,797