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Revenues - Schedule of Contract Assets and Contract Liabilities (Details) - ASC 2014-09
$ in Thousands
Jun. 30, 2021
USD ($)
Deferred Revenue Arrangement [Line Items]  
Balance, Contract Assets at December 31, 2020 $ 3,462
Balance, Contract Assets at June 30, 2021 1,624
Balance, Contract Liabilities at December 31, 2020 18,601
Balance, Contract Liabilities at June 30, 2021 $ 13,970