VARIABLE INTEREST ENTITIES - Cavalier Minerals Distributions (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Variable Interest Entities
Distributions paid to Partners	$ 32,925	$ 57,468
Cavalier Minerals \| Alliance Minerals
Variable Interest Entities
Distributions paid to Partners	$ 4,563
Cavalier Minerals \| Bluegrass Minerals
Variable Interest Entities
Incentive distribution for noncontrolling owners (as a percent)	25.00%
Distributions paid to Partners	$ 190
Cavalier Minerals \| Variable Interest Entity, Primary Beneficiary \| Alliance Minerals
Variable Interest Entities
Ownership interest in VIE (as a percent)	96.00%

The percentage incentive distribution to which the noncontrolling owner of the investment is entitled as managing member.

No definition available.

+ Details

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- Definition

The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64801991&loc=SL6759159-111685

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- Details

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- Details

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- Details

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- Details

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- Details

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