XML 67 R52.htm IDEA: XBRL DOCUMENT
v3.25.0.1

LEASES - As Lessor - Straight-Line Rent (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Unbilled Straight-Line Rent |  |  |
Unbilled rent receivable | $ 16,988,000 | $ 16,661,000 |
Period during which amount of unbilled rent receivable is to be billed and received | 17 years | 17 years |
Unbilled straight-line rent receivables written off related to property sold | $ 1,045,000 | $ 1,048,000 | $ 519,000
Unearned rental income | $ 416,000 | $ 579,000 |
Period during which amount of unbilled rent payable is to be billed and received | 17 years | 17 years |
Unbilled rent receivable written off during the period due to the sale of property | $ 0 | $ 43,000 | $ 0
Unbilled rent straight-line rent receivable written off related to tenant bankruptcy | $ 50,000 | $ 133,000 |

X
- Definition Represents the amount of rent reported on a straight-line basis less than rental payments required under the respective leases. + References No definition available. + Details
Name: | olp_DeferredRentPayables
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the period during which amount of rent is to be billed and received pursuant to the lease terms. + References No definition available. + Details
Name: | olp_DeferredRentPayablesPeriodDuringWhichAmountOfRentToBeBilledAndPayables
Namespace Prefix: | olp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period during which amount of rent is to be billed and received pursuant to the lease terms. + References No definition available. + Details
Name: | olp_DeferredRentReceivablePeriodDuringWhichAmountOfRentToBeBilledAndReceived
Namespace Prefix: | olp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of unbilled rent receivable written off during the period relating to properties sold. + References No definition available. + Details
Name: | olp_StraightLineRentReceivableWrittenOffRelatingToPropertySold
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of unbilled rent receivable written off during the period related to tenant bankruptcy or going concern issues. + References No definition available. + Details
Name: | olp_StraightLineRentReceivableWrittenOffRelatingToTenantFilingBankruptcy
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of unbilled rent receivable written off during the period due to the sale of property. + References No definition available. + Details
Name: | olp_UnbilledRentReceivableWrittenOffDueToSaleOfProperty
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition n/a + References No definition available. + Details
Name: | olp_UnbilledStraightLineRentAbstract
Namespace Prefix: | olp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of excess of rental income recognized over rental payment required by lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 840 -SubTopic 20 -Name Accounting Standards Codification -Section 35 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481123/840-20-35-2 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 840 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481178/840-20-25-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 25 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479341/842-30-25-11 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 840 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481178/840-20-25-2 + Details
Name: | us-gaap_DeferredRentReceivablesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant