XML 134 R104.htm IDEA: XBRL DOCUMENT v3.21.2
REVENUE - RECEIVABLES AND CONTRACT LIABILITIES BALANCES (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Contract with Customer, Asset [Roll Forward]      
Beginning of period, January 1, 2021 $ 111,871 $ 20,577 $ 9,056
End of period, June 30, 2021 147,168 111,871 20,577
Increase in receivables during the period 35,297 91,294 11,521
Contract with Customer, Liability [Roll Forward]      
Beginning of period, January 1, 2021 2,060 954 1,727
End of period, June 30, 2021 3,605 2,060 954
Increase in contract liabilities during the period $ 1,545 $ 1,106 $ (773)