Certain Balance Sheet Components (Schedule of Accounts Payable and Accrued Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts Payable And Accrued Liabilities Current [Abstract]
Accrued payroll and benefits	$ 28,055	$ 12,920
Accounts payable	24,614	12,734
Deferred revenue	10,517	5,514
Accrued taxes	23,697	6,638
Accrued interest	5,470	6,946
Operating lease liabilities	4,538	4,998
Other current liabilities	11,534	10,827
Total accounts payable and accrued liabilities	$ 108,425	$ 60,577