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Contract Assets and Liabilities - Additional information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]          
Allowance for doubtful accounts associated with contract assets $ 339   $ 339   $ 359
Revenues recognized during period $ 22,300 $ 16,900 $ 73,900 $ 43,000