XML 37 R26.htm IDEA: XBRL DOCUMENT v3.21.2
Contract Assets and Liabilities - Additional information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]          
Allowance for doubtful accounts associated with contract assets $ 376   $ 376   $ 359
Revenues recognized during period $ 13,800 $ 31,300 $ 98,000 $ 57,700