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Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Summary of Deferred Revenue Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Deferred revenue $ 252,034 $ 274,036
Other Long-term Liabilities $ 34,813 $ 36,029