SUBSEQUENT EVENTS - Narrative (Details) - Ram Powell Unit - Subsequent Event $ in Millions	May 01, 2018 USD ($) lease_block
Subsequent Event [Line Items]
Percent of working interest acquired	100.00%
Number of lease blocks acquired \| lease_block	6
Purchase price	$ 34.0
Surety bond	200.0
Cash received at closing, related to purchase price adjustments	$ 29.4

Business Combination, Purchase Price Less Purchase Price Adjustments, Cash Received

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- Definition

Number Of Lease Blocks Acquired

+ References

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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- Definition

Amount of letters of credit and other surety bonds that are available for the future payment of malpractice claims.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 450
-Section 50
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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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