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VARIABLE INTEREST ENTITIES - All Dale III (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Feb. 28, 2017
Equity Investments
Investments in affiliate	$ 28,529	$ 161,309
Percentage of available cash distributed	100.00%
All Dale Minerals III
Equity Investments
Investments in affiliate	$ 28,529	28,974	$ 14,182
Other Commitment				$ 30,000
Distribution after hurdles (as a percent)	25.00%
Specified internal rate of return (as a percent)	10.00%
Percentage of available cash distributed	125.00%
Distributions received	$ 2,648	$ 1,355
All Dale Minerals III | All Dale Minerals III
Equity Investments
Ownership percentage by limited partners	13.90%

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The specified internal rate of return to determine distribution percentage, as a percent.

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The distribution percentage after the hurdles are reached.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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