XML 43 R40.htm IDEA: XBRL DOCUMENT
v2.4.1.9

SIGNIFICANT ACCOUNTING POLICIES (Details 5) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 state property | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 state property | Dec. 31, 2013 | Dec. 31, 2012
Concentration of Credit Risk |  |  |  |  |  |  |  |  |  |  |
Number of states in which properties are located | 30 us-gaap_NumberOfStatesInWhichEntityOperates |  |  |  |  |  |  |  | 30 us-gaap_NumberOfStatesInWhichEntityOperates |  |
Number of real estate investments | 115 us-gaap_NumberOfRealEstateProperties |  |  |  |  |  |  |  | 115 us-gaap_NumberOfRealEstateProperties |  |
Rental revenues | $ 15,223,000 us-gaap_RealEstateRevenueNet | $ 15,187,000 us-gaap_RealEstateRevenueNet | $ 15,665,000 us-gaap_RealEstateRevenueNet | $ 14,402,000 us-gaap_RealEstateRevenueNet | $ 14,166,000 us-gaap_RealEstateRevenueNet | $ 12,970,000 us-gaap_RealEstateRevenueNet | $ 11,981,000 us-gaap_RealEstateRevenueNet | $ 11,862,000 us-gaap_RealEstateRevenueNet | $ 60,477,000 us-gaap_RealEstateRevenueNet | $ 50,979,000 us-gaap_RealEstateRevenueNet | $ 43,793,000 us-gaap_RealEstateRevenueNet
Rental income | Geographic concentration | Texas |  |  |  |  |  |  |  |  |  |  |
Concentration of Credit Risk |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 13.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_TX | 13.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_TX | 10.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_TX
Rental income | Geographic concentration | New York |  |  |  |  |  |  |  |  |  |  |
Concentration of Credit Risk |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 9.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_NY | 11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_NY | 12.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_NY
Rental income | Geographic concentration | New Jersey |  |  |  |  |  |  |  |  |  |  |
Concentration of Credit Risk |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 9.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_NJ | 10.70%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_NJ | 8.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_NJ
Rental income | Geographic concentration | Pennsylvania |  |  |  |  |  |  |  |  |  |  |
Concentration of Credit Risk |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 7.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_PA | 8.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_PA | 10.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_StatementGeographicalAxis = stpr_PA
Rental income | Customer concentration | Haverty Furniture Companies, Inc. |  |  |  |  |  |  |  |  |  |  |
Concentration of Credit Risk |  |  |  |  |  |  |  |  |  |  |
Number of states in which properties are located | 6 us-gaap_NumberOfStatesInWhichEntityOperates / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember |  |  |  |  |  |  |  | 6 us-gaap_NumberOfStatesInWhichEntityOperates / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 8.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember | 9.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember | 11.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember
Number of real estate investments | 11 us-gaap_NumberOfRealEstateProperties / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember |  |  |  |  |  |  |  | 11 us-gaap_NumberOfRealEstateProperties / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember |  |
Real estate investments (as a percent) |  |  |  |  |  |  |  |  | 9.10%olp_ConcentrationRiskRealEstateInvestmentsAsPercentageOfDepreciatedBookValue / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember | 9.50%olp_ConcentrationRiskRealEstateInvestmentsAsPercentageOfDepreciatedBookValue / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember |
Rental revenues |  |  |  |  |  |  |  |  | $ 4,844,000 us-gaap_RealEstateRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember | $ 4,844,000 us-gaap_RealEstateRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember | $ 4,844,000 us-gaap_RealEstateRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = olp_RentalRevenueMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = olp_HavertyFurnitureCompaniesIncMember

X
- Definition Represents the real estate investments, expressed as a percentage of depreciated book value of real estate investments held as of the balance sheet date. + References No definition available. + Details
Name: | olp_ConcentrationRiskRealEstateInvestmentsAsPercentageOfDepreciatedBookValue
Namespace Prefix: | olp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate revenue from real estate operations during the reporting period. + 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=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_RealEstateRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=olp_RentalRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |