XML 56 R44.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Allowance for Doubtful Accounts (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2017 property | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) property | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Allowance for Doubtful Accounts |  |  |  |  |  |
Balance in allowance for doubtful accounts |  | $ 0 |  | $ 0 |  | $ 0
Bad debt expense |  | $ 0 | $ 0 | $ 310,000 | $ 190,000 |
Number of properties relating to bad debt expense | property |  |  |  | 4 |  |
Number of properties sold | property | 1 |  |  |  |  |
Percentage of rental income |  | 1.20% | 1.20% | 1.20% | 1.20% |
Write-off of unbilled rent receivable |  |  |  | $ 362,000 |  |
Write-off of unamortized intangible lease assets |  |  |  | 67,000 |  |
Write off of tenant origination costs |  |  |  | 884,000 |  |
Impairment charge on other than ann arbor property |  |  |  | $ 0 |  |
Number of properties other than ann arbor property | property |  |  |  | 2 |  |
Impairment loss |  | $ 153,000 |  | $ 153,000 |  |
Net book value of property |  | $ 2,382,000 |  | 2,382,000 |  |
Joe's Crab Shack restaurant Ann Arbor, Michigan |  |  |  |  |  |
Allowance for Doubtful Accounts |  |  |  |  |  |
Impairment loss |  |  |  | $ 153,000 |  |
Sports Authority Inc. |  |  |  |  |  |
Allowance for Doubtful Accounts |  |  |  |  |  |
Bad debt expense |  |  |  |  | $ 190,000 |
Maximum | Sports Authority Inc. |  |  |  |  |  |
Allowance for Doubtful Accounts |  |  |  |  |  |
Percentage of rental income |  |  | 1.00% |  | 1.00% |

X
- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value on other than ann arbor property. + References No definition available. + Details
Name: | olp_ImpairmentOfRealEstateOnOtherThanAnnArborProperty
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of properties which are occupied by tenant and classified as bad debt. + References No definition available. + Details
Name: | olp_NumberOfPropertiesRelatingToBadDebtExpense
Namespace Prefix: | olp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of properties which are sold related to bad debt expense. + References No definition available. + Details
Name: | olp_NumberOfPropertiesSoldRelatedToBadDebtExpense
Namespace Prefix: | olp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties with bad debt expense other than ann arbor property. + References No definition available. + Details
Name: | olp_NumberOfRealEstatePropertiesOtherThanAnnArborProperty
Namespace Prefix: | olp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represent the percentage of the company's rental income accounted by the tenant. + References No definition available. + Details
Name: | olp_PercentageOfEntityRentalIncomeAccountedByTenant
Namespace Prefix: | olp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents information pertaining to write-off of tenant origination costs. + References No definition available. + Details
Name: | olp_WriteOffOfTenantOriginationCosts
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of unamortized intangible lease assets written off during the period. + References No definition available. + Details
Name: | olp_WriteOffOfUnamortizedIntangibleLeaseAssets
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. + References No definition available. + Details
Name: | olp_WriteOffOfUnbilledRentReceivable
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 No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
Name: | us-gaap_ImpairmentOfRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
Name: | us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The book value of investments in real estate joint ventures including direct and indirect investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_RealEstateInvestmentsJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=olp_RestaurantPropertyAnnArborMichiganMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CounterpartyNameAxis=olp_SportsAuthorityInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |