REAL ESTATE OPERATIONS - Subsurface Interests (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($) a county	Jun. 30, 2019 USD ($) a	Jun. 30, 2020 USD ($) a county	Jun. 30, 2019 USD ($) a
Subsurface interests
Revenue from contract with customer, including assessed tax	$ 6	$ 261	$ 87	$ 496
Over Lease Term	$ 11,473	$ 10,375	22,476	21,099
Subsurface Interests
Subsurface interests
Revenue from contract with customer, including assessed tax			0	0
Over Lease Term			$ 0	$ 214
Number of acres with operating oil wells \| a	800	800	800	800
Surface land over subsurface interests
Subsurface interests
Area of land (in acres) \| a	455,000		455,000
Number of counties in which Subsurface Interests are owned \| county	20		20
Revenue recognized for cash payments for the release of surface entry rights			$ 67	$ 0
Real Estate Operations \| Subsurface Interests
Subsurface interests
Revenue from contract with customer, including assessed tax	$ 0	$ 20	$ 10	$ 29

The number of counties in which the entity owns subsurface interests as of balance sheet date.

No definition available.

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- Definition

The revenue from real estate operations recognized for cash payments received for the release of surface entry rights during the reporting period.

+ References

No definition available.

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- References

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- Definition

Area assigned to productive oil and gas wells with working interest ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1208
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- Definition

Area of land held.

+ References

No definition available.

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- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

+ References

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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