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INVESTMENTS - AllDale (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Changes in equity method investment |  |
Beginning balance | $ 28,529 |
Equity method investment income (loss) | 451 | $ 324
Ending balance | 28,114 |
All Dale Minerals III |  |
Changes in equity method investment |  |
Beginning balance | 28,529 | 28,974
Equity method investment income (loss) | 451 | 324
Distributions received | (593) | (528)
Other | (273) |
Ending balance | $ 28,114 | $ 28,770

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