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SEGMENT INFORMATION - Revenues from External Customers (Details) - Perenco and SNH - Sales revenue, net - Customer concentration risk - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenues from external customers:      
Concentration risk amount $ 245,418 $ 213,970 $ 221,020
Concentration risk percentage (in percent) 82.00% 80.00% 85.00%