XML 52 R37.htm IDEA: XBRL DOCUMENT
v3.7.0.1

SIGNIFICANT ACCOUNTING POLICIES - Principles of Consolidation (Details) | 12 Months Ended | 36 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2016 USD ($)
Investment in Joint Ventures and Variable Interest Entities |  |  |  |
Number of Unconsolidated Joint Venture VIEs | item | 0 |  |  |
Recourse debt of joint venture | $ 0 |  |  | $ 0
Impairment charges relating to investments in unconsolidated joint ventures |  |  |  | 0
Revenue Recognition |  |  |  |
Additional rental income for the reimbursement of expenses | $ 6,424,000 | $ 3,852,000 | $ 2,561,000 |
Purchase Accounting for Acquisition of Real Estate |  |  |  |
Estimated useful lives of intangible assets, minimum | 1 year |  |  |
Estimated useful lives of building and intangible assets, maximum | 39 years |  |  |
Escrow, Deposits and Other Assets and Receivables |  |  |  |
Real estate taxes, insurance and other Escrows' | $ 387,000 | 1,390,000 |  | 387,000
Balance in allowance for doubtful accounts | 0 | 0 |  | 0
Aggregate bad debt expense relating to rental income, tenant reimbursements and unbilled rent receivable | 105,000 |  |  |
Bad debt expense | 98,000 |  | 0 |
Write-off of unbilled straight-line rent receivable |  | 89,000 |  |
Write-off of unbilled rent receivable | 7,000 | 566,000 | 79,000 |
Impairment charge | 0 | $ 0 | $ 1,093,000 |
Net book value of property | $ 2,628,000 |  |  | $ 2,628,000
Percentage of rental income | 1.00% | 1.00% | 1.00% |

X
- Definition Minimum useful life of finite-lived intangible assets or liabilities used in the normal conduct of business and not intended for resale. + References No definition available. + Details
Name: | olp_IntangibleAssetsLiabilitiesUsefulLifeMinimum
Namespace Prefix: | olp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of debt for which the creditor has general recourse to the joint venture debtor. + References No definition available. + Details
Name: | olp_JointVentureRecourseDebt
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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 Maximum useful life of finite-lived intangible assets and long lived, physical assets used in the normal conduct of business and not intended for resale. + References No definition available. + Details
Name: | olp_PropertyPlantAndEquipmentAndIntangibleAssetsLiabilitiesUsefulLifeMaximum
Namespace Prefix: | olp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing aggregate provision for doubtful accounts of rental income, tenant reimbursements and unbilled rent receivable. + References No definition available. + Details
Name: | olp_ProvisionForDoubtfulAccountsOfRentalIncomeTenantReimbursementsAndUnbilledRentReceivable.
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amounts related to Real estate taxes, insurance and other escrows related to real estate in escrow, deposits and other assets and receivables. + References No definition available. + Details
Name: | olp_ReTaxesInsuranceAndOtherEscrows
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of unconsolidated joint venture investments that are classified as a Variable Interest Entity (VIE). + References No definition available. + Details
Name: | olp_UnconsolidatedJointVentureVariableInterestEntityNumberOfEntities
Namespace Prefix: | olp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents information pertaining to write-off of straight line rent. + References No definition available. + Details
Name: | olp_WriteOffOfStraightLineRent
Namespace Prefix: | olp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 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 amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e25351-111560 + Details
Name: | us-gaap_ImpairmentOfInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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
- References No definition available. + Details
Name: | us-gaap_RealEstateInvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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
- References No definition available. + Details
Name: | us-gaap_RestrictedCashAndInvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueRecognitionAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition In accordance with the provisions of their lease agreement, this element represents allowable charges due a landlord from its tenant. In retail store and office building leases, for example, tenant reimbursements may cover items such as taxes, utilities, and common area expenses. + 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 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_TenantReimbursements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_VariableInterestEntityNotPrimaryBeneficiaryDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration