XML 53 R42.htm IDEA: XBRL DOCUMENT v3.25.3

REAL ESTATE ACQUISITIONS - Acquisitions (Details) - Real Estate Acquisitions in 2025 - USD ($) $ in Thousands					9 Months Ended
	Aug. 27, 2025	Mar. 14, 2025	Feb. 06, 2025	Jan. 16, 2025	Sep. 30, 2025
REAL ESTATE ACQUISITIONS
Contract Purchase Price					$ 112,300
Capitalized Transaction Costs					$ 625
Multi-tenant (2 properties), Theodore, Alabama
REAL ESTATE ACQUISITIONS
Contract Purchase Price				$ 49,000
Capitalized Transaction Costs				197
New mortgage debt				$ 29,000
Interest rate (as a percent)				6.12%
Amazon.com Services, LLC industrial property in Wichita, Kansas
REAL ESTATE ACQUISITIONS
Contract Purchase Price			$ 13,300
Capitalized Transaction Costs			230
New mortgage debt			$ 7,500
Interest rate (as a percent)			6.09%
Multi-Tenant industrial property in Council Bluffs, Iowa
REAL ESTATE ACQUISITIONS
Contract Purchase Price		$ 26,000
Capitalized Transaction Costs		111
New mortgage debt		$ 15,600
Interest rate (as a percent)		6.42%
Charter Next Generation, Inc, Blythewood, South Carolina
REAL ESTATE ACQUISITIONS
Contract Purchase Price	$ 24,000
Capitalized Transaction Costs	87
New mortgage debt	$ 14,000
Interest rate (as a percent)	5.77%

X

- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth, excluding acquisition costs.

+ References

No definition available.

+ Details

Name:	olp_PaymentsToAcquireRealEstateExcludingAcquisitionCosts
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the real estate acquisition cost capitalized.

+ References

No definition available.

+ Details

Name:	olp_RealEstateAcquisitionCostCapitalized
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 15
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480123/805-50-15-3

+ Details

Name:	us-gaap_AssetAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of increase in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from new investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478322/948-310-S50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column G)(Footnote 6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479628/948-310-S99-1

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateNewMortgageLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_AssetAcquisitionAxis=olp_RealEstateAcquisitionsIn2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=olp_TwoMultiTenantIndustrialPropertiesTheodoreAlabamaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=olp_Amazon.comServicesIndustrialPropertyWichitaKansasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=olp_MultiTenantIndustrialPropertyCouncilBluffsIowaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=olp_CharterNextGenerationIncBlythewoodSouthCarolinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: