XML 134 R103.htm IDEA: XBRL DOCUMENT v3.20.1

SUBSEQUENT EVENTS (Details)	Mar. 02, 2020 BarrelOfButane $ / bbl	Feb. 27, 2020 BarrelOfButane $ / bbl	Feb. 25, 2020 BarrelOfButane $ / bbl	Dec. 31, 2018 $ / bbl	Dec. 31, 2017 $ / bbl	Sep. 25, 2017
Number of Barrels Per Day						1,000
Put Option
Derivative, Price Risk Option Strike Price				49.00	49.00
Call Option
Derivative, Price Risk Option Strike Price				54.60	55.35
Subsequent Event | Period One [Member]
Number of Barrels Per Day | BarrelOfButane			1,000
Subsequent Event | Period Two [Member]
Number of Barrels Per Day | BarrelOfButane			1,000
Subsequent Event | Period Three [Member]
Number of Barrels Per Day | BarrelOfButane		1,000
Subsequent Event | Period Four [Member]
Number of Barrels Per Day | BarrelOfButane	1,500
Subsequent Event | Put Option | Period One [Member]
Derivative, Price Risk Option Strike Price			45.00
Subsequent Event | Put Option | Period Two [Member]
Derivative, Price Risk Option Strike Price			45.00
Subsequent Event | Put Option | Period Three [Member]
Derivative, Price Risk Option Strike Price		40.00
Subsequent Event | Put Option | Period Four [Member]
Derivative, Price Risk Option Strike Price	40.00
Subsequent Event | Call Option | Period One [Member]
Derivative, Price Risk Option Strike Price			54.72
Subsequent Event | Call Option | Period Two [Member]
Derivative, Price Risk Option Strike Price			52.71
Subsequent Event | Call Option | Period Three [Member]
Derivative, Price Risk Option Strike Price		55.08
Subsequent Event | Call Option | Period Four [Member]
Derivative, Price Risk Option Strike Price	55.35

X

- Definition

Represents the number of barrel traded per day.

+ References

No definition available.

+ Details

Name:	rei_NumberOfBarrelsPerDay
Namespace Prefix:	rei_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The strike price on the price risk option contract such as a put option or a call option.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativePriceRiskOptionStrikePrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_PutOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CallOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=rei_PeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=rei_PeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=rei_PeriodThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=rei_PeriodFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: