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INVESTMENT - AllDale (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
ASSETS
Beginning balance			$ 27,268
Equity method investment income	$ 703	$ 62	1,106	$ 650
Ending balance	26,180		26,180
All Dale Minerals III
ASSETS
Beginning balance	26,274	27,705	27,268	28,529
Equity method investment income	703	62	1,106	650
Distributions received	(797)	(352)	(2,194)	(1,491)
Other				(273)
Ending balance	$ 26,180	$ 27,415	$ 26,180	$ 27,415

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