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Investments in and Advances to Affiliates (Tables)
12 Months Ended
Dec. 31, 2023
Investments in and Advances to Affiliates [Abstract]  
Investments in and Advances to Affiliates
Our investments as of December 31, 2023 and 2022, consist of the following:
 December 31,
 20232022
 (In Thousands)
Investment in CSI Compressco$8,538 $6,967 
Investment in CarbonFree6,850 6,139 
Investment in Standard Lithium1,616 1,180 
Other investments
350 — 
Total investments$17,354 $14,286