Cash, Cash Equivalents, Restricted Cash And Cash Equivalents And Investments (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents, Current	$ 493,808	$ 66,684
Short-term Investments	2,124,872	$ 1,597,241
Bank Account (Argentine Central Bank Regulation) [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents, Current	$ 217,158
Sovereign Debt Securities (Central Bank of Brazil Mandatory Guarantee) [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Percent of electronic funds	100.00%	100.00%
Short-term Investments	$ 530,660	$ 506,175