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Balance Sheet Components (Schedule of Other Non-Current Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]      
Non-current deferred income taxes $ 58,930 $ 57,557  
Long-term investments 8,147 2,886 $ 4,505
Other 7,202 6,990  
Total $ 74,279 $ 67,433