Financial Expenses, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financial expenses:
Interest expense	$ (13,147)	$ (13,718)	$ (13,491)
Amortization of discount and issuance costs	(4,514)	(156)	(2,777)
Foreign currency transaction losses	0	(431)	(398)
Others	(389)	(338)	(242)
Financial expenses	(18,050)	(14,643)	(16,908)
Financial income:
Amortization of treasury bills premium	1,316	2,331	1,986
Foreign currency transaction gains	2,648	0	0
Interest income	1,787	4,402	2,652
Financial income	5,751	6,733	4,638
Total financial expenses, net	$ (12,299)	$ (7,910)	$ (12,270)