XML 50 R39.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Variable Interest Entities, Contingent Liabilities and Consolidated Joint Ventures - Ground Leases (Details) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Nov. 30, 2017 USD ($) | Mar. 31, 2018 USD ($) item | Mar. 31, 2017 USD ($) | Dec. 31, 2017 USD ($)
Variable Interest Entities |  |  |  |
Number of VIEs through ground leases | item |  | 3 |  |
Owner/operator supplemental mortgage | $ 7,556,000 |  |  |
Owner/operator original mortgage | 43,824,000 |  |  |
Fixed rent payment due to second mortgage | $ 5,906,000 |  |  |
Cash Reserves - ground lease |  | $ 429,000 |  | $ 443,000
Accrued expenses and other liabilities |  |  |  |
Variable Interest Entities |  |  |  |
Fixed rent payment balance |  | 5,816,000 |  | $ 5,870,000
The Meadows Apartments, Lakemoor, Illinois; Briarbrook Village Apartments, Wheaton, Illinois and Vue Apartments, Beachwood, Ohio |  |  |  |
Variable Interest Entities |  |  |  |
Land Contract Purchase Price |  | $ 33,726,000 |  |
Units in Apartment Complex | item |  | 1,186 |  |
Owner/ Operator Mortgage from Third Party |  | $ 158,210,000 |  |
Carrying Amount and Maximum Exposure to Loss |  | 34,029,000 |  |
The Meadows Apartments, Lakemoor, Illinois |  |  |  |
Variable Interest Entities |  |  |  |
Land Contract Purchase Price |  | $ 9,300,000 |  |
Units in Apartment Complex | item |  | 496 |  |
Owner/ Operator Mortgage from Third Party |  | $ 51,355,000 |  |
The Meadows Apartments, Lakemoor, Illinois | Land |  |  |  |
Variable Interest Entities |  |  |  |
Carrying Amount and Maximum Exposure to Loss |  | 9,592,000 |  |
The Briarbrook Village Apartments Wheaton, Illinois |  |  |  |
Variable Interest Entities |  |  |  |
Land Contract Purchase Price |  | $ 10,530,000 |  |
Units in Apartment Complex | item |  | 342 |  |
Owner/ Operator Mortgage from Third Party |  | $ 39,411,000 |  |
The Briarbrook Village Apartments Wheaton, Illinois | Land |  |  |  |
Variable Interest Entities |  |  |  |
Carrying Amount and Maximum Exposure to Loss |  | 10,536,000 |  |
The Vue Apartments, Beachwood, Ohio |  |  |  |
Variable Interest Entities |  |  |  |
Land Contract Purchase Price |  | $ 13,896,000 |  |
Units in Apartment Complex | item |  | 348 |  |
Owner/ Operator Mortgage from Third Party |  | $ 67,444,000 |  |
The Vue Apartments, Beachwood, Ohio | Land |  |  |  |
Variable Interest Entities |  |  |  |
Carrying Amount and Maximum Exposure to Loss |  | 13,901,000 |  |
The Meadows Apartment Lakemoor, Illinois; Briarbrook Village Apartment, Wheaton, Illinois; and Vue Apartment, Beachwood, Ohio |  |  |  |
Variable Interest Entities |  |  |  |
Revenue from the ground lease |  | $ 1,006,000 | $ 888,000 |

X
- Definition Cash outflow for the acquisition of land for the Company's ground leases + References No definition available. + Details
Name: | olp_ContractPurchasePriceOfLand
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the number of apartment units in the complex purchased during the period. + References No definition available. + Details
Name: | olp_NumberOfApartmentComplexUnitsPurchased
Namespace Prefix: | olp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition It Represents the number of VIEs of the company through ground leases. + References No definition available. + Details
Name: | olp_NumberOfVariableInterestEntitiesThroughGroundLeases
Namespace Prefix: | olp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the amount of mortgage balance related to third parties. + References No definition available. + Details
Name: | olp_OwnerOrOperatorMortgageDebtFromThirdParty
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. + References No definition available. + Details
Name: | olp_RestrictedCashGroundLease
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of variable interest entity balance fixed rent payment. + References No definition available. + Details
Name: | olp_VariableInterestEntityBalanceFixedRentPayment
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition It represents the amount of variable interest entity fixed rent payment due to second mortgage. + References No definition available. + Details
Name: | olp_VariableInterestEntityFixedRentPaymentDueToSecondMortgage
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition It represents the amount of variable interest entity original mortgage amount. + References No definition available. + Details
Name: | olp_VariableInterestEntityOriginalMortgageAmount
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition It represents the amount of variable interest entity supplemental mortgage. + References No definition available. + Details
Name: | olp_VariableInterestEntitySupplementalMortgageAmount
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707 + Details
Name: | us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5728-111685 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5747-111685 + Details
Name: | us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 No definition available. + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=olp_AccruedAndOtherLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=olp_LandLocatedInMeadowsApartmentsLakemoorIllinoisLandBriarbrookVillageApartmentsWheatonIllinoisAndLandVueApartmentsBeachwoodOhioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=olp_LandLocatedInMeadowsApartmentsLakemoorIllinoisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=olp_LandLocatedInBriarbrookVillageApartmentsWheatonIllinoisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=olp_LandLocatedInVueApartmentsBeachwoodOhioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=olp_LandLocatedInMeadowsApartmentLakemoorIllinoisBriarbrookVillageApartmentWheatonIllinoisAndVueApartmentBeachwoodOhioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |