Balance Sheet Components (Schedule of Current Other Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current Other Assets [Line Items]
Other current assets	$ 88,736	$ 61,569
VAT Credits [Member]
Current Other Assets [Line Items]
Other current assets	16,997	19,656
Income Tax Credits [Member]
Current Other Assets [Line Items]
Other current assets	57,844	26,304
Sales Tax [Member]
Current Other Assets [Line Items]
Other current assets	442	5,307
Other [Member]
Current Other Assets [Line Items]
Other current assets	$ 13,453	$ 10,302