XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.24.3

RELATED PARTY TRANSACTIONS - Joint Venture Partners and Affiliates (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Unconsolidated Joint Venture |  |  |  |
Related Party Transactions |  |  |  |
Payments for property management services |  | $ 31,000 |  | $ 89,000
Aggregate management fees paid to other partners | $ 1,000 |  | $ 4,000 |
Increase (decrease) in equity earnings, joint venture transaction | (1,000) | (16,000) | (2,000) | (44,000)
Joint Venture Partners and Affiliates | Real estate expenses |  |  |  |
Related Party Transactions |  |  |  |
Payments for property management services | $ 24,000 | $ 22,000 | $ 70,000 | $ 69,000

X
- Definition Aggregate management fees paid to other partners of the venture. + References No definition available. + Details
Name: | olp_AggregateFeesPaidToOtherPartners
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (decrease) in equity in earnings of unconsolidated joint ventures on the consolidated statement of income. + References No definition available. + Details
Name: | olp_IncreaseDecreaseInEquityInEarningsJointVentureTransaction
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the aggregate costs related to management of properties during the reporting period. + References No definition available. + Details
Name: | olp_RealEstatePropertyManagementCosts
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=olp_UnconsolidatedJointVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=olp_JointVenturePartnersAndAffiliatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=olp_RealEstateExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |