Accrued Liabilities and Other Long Term Liabilities (Schedule of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Accrued employee compensation and related expenses	$ 167,649	$ 127,174
Accrued expenses (Note 16)	112,526	86,296
Accrued customer incentives and refund obligations	75,064	63,079
Accrued taxes	42,676	31,108
Current lease liabilities	$ 17,733	$ 15,281
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Accrued liabilities	$ 415,648	$ 322,938