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Revenue Recognition - Revenue Recognized During Period (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Amounts included in contract liabilities at the beginning of the period:    
Performance obligations satisfied $ 1,094 $ 862
Changes in the period:    
Changes in the estimated transaction price allocated to performance obligations satisfied in prior periods 215 24
Performance obligations satisfied from new activities in the period - contract revenue 34,031 17,146
Total revenues $ 35,340 $ 18,032