Other Receivables and Current Assets and Other Accrued Expenses and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other Receivables and Current Assets and Other Accrued Expenses and Liabilities [Abstract]
Receivables related to unrecognized revenue	$ 192,154	$ 177,679
Income taxes receivable, including overpayments and refunds	31,628	26,672
Prepaid expenses and other current assets	44,740	45,268
Total other receivables and current assets	268,522	249,619
Consumption, sales and VAT tax liabilities	45,156	36,398
Accrued expenses and other current liabilities	154,310	106,549
Total other accrued expenses and liabilities	$ 199,466	$ 142,947