$OLP
ONE LIBERTY PROPERTIES INC Stock $olp

$olp Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000110465920033752 Filed on March 16, 2020

Income Statement

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$20.27M	$19.57M	$19.75M
YoY Change	1.91%	2.25%	7.29%
Cost Of Revenue	$3.600M	$2.650M	$2.590M
YoY Change	7.14%	-4.68%	-0.38%
Gross Profit	$16.67M	$16.92M	$17.16M
YoY Change	0.79%	3.42%	8.47%
Gross Profit Margin	82.24%	86.46%	86.88%
Selling, General & Admin	$3.020M	$3.150M	$3.120M
YoY Change	5.23%	13.31%	5.05%
% of Gross Profit	18.12%	18.62%	18.18%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.060M	$5.670M	$5.250M
YoY Change	57.12%	10.74%	1.16%
% of Gross Profit	48.35%	33.51%	30.59%
Operating Expenses	$11.07M	$11.47M	$8.380M
YoY Change	42.47%	45.2%	2.7%
Operating Profit	$5.600M	$12.68M	$8.780M
YoY Change	-36.15%	49.93%	14.62%
Interest Expense	-$4.400M	$4.448M	-$4.250M
YoY Change	1.62%	-198.63%	-6.59%
% of Operating Profit	-78.57%	35.07%	-48.41%
Other Income/Expense, Net	$700.0K	$10.00K	$10.00K
YoY Change	-468.42%	-83.33%	-96.88%
Pretax Income	$180.0K	$10.18M	$4.550M
YoY Change	-95.75%	42.78%	-54.45%
Income Tax
% Of Pretax Income
Net Earnings	$150.0K	$10.15M	$4.517M
YoY Change	-96.44%	42.71%	-54.69%
Net Earnings / Revenue	0.74%	51.85%	22.87%
Basic Earnings Per Share	-$0.01	$0.53	$0.23
Diluted Earnings Per Share	-$0.01	$0.52	$0.23
COMMON SHARES
Basic Shares Outstanding	18.73M	18.65M	18.52M
Diluted Shares Outstanding	18.75M	18.71M	18.59M

Balance Sheet

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$15.20M	$17.20M	$12.90M
YoY Change	10.14%	15.44%	-10.42%
Cash & Equivalents	$15.20M	$17.17M	$12.90M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$13.70M	$13.40M	$14.60M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$28.90M	$30.60M	$27.50M
YoY Change	3.58%	6.62%	-2.14%
LONG-TERM ASSETS
Property, Plant & Equipment	$705.5M	$663.7M	$676.6M
YoY Change	5.87%	0.59%	2.25%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$10.90M	$10.30M	$11.20M
YoY Change	1.87%	-2.83%	3.7%
Other Assets	$9.100M	$11.60M	$8.600M
YoY Change	28.17%	75.76%	-52.22%
Total Long-Term Assets	$752.0M	$711.8M	$724.4M
YoY Change	5.22%	0.41%	0.12%
TOTAL ASSETS
Total Short-Term Assets	$28.90M	$30.60M	$27.50M
Total Long-Term Assets	$752.0M	$711.8M	$724.4M
Total Assets	$780.9M	$742.4M	$751.9M
YoY Change	5.16%	0.65%	0.04%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$11.10M	$8.000M	$13.50M
YoY Change	-31.06%	-32.77%	23.85%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$19.80M	$16.70M	$22.20M
YoY Change	-19.51%	-16.5%	18.09%
LONG-TERM LIABILITIES
Long-Term Debt	$448.5M	$403.0M	$411.4M
YoY Change	11.59%	0.05%	-2.28%
Other Long-Term Liabilities	$14.00M	$15.30M	$16.60M
YoY Change	-20.45%	-15.0%	-9.78%
Total Long-Term Liabilities	$462.5M	$418.3M	$428.0M
YoY Change	10.25%	-0.59%	-2.59%
TOTAL LIABILITIES
Total Short-Term Liabilities	$19.80M	$16.70M	$22.20M
Total Long-Term Liabilities	$462.5M	$418.3M	$428.0M
Total Liabilities	$482.3M	$436.4M	$451.6M
YoY Change	8.61%	-1.36%	-1.83%
SHAREHOLDERS EQUITY
Retained Earnings	-$10.73M
YoY Change
Common Stock	$306.0M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$297.1M	$306.1M	$300.3M
YoY Change
Total Liabilities & Shareholders Equity	$780.9M	$742.4M	$751.9M
YoY Change	5.16%	0.65%	0.04%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	$150.0K	$10.15M	$4.517M
YoY Change	-96.44%	42.71%	-54.69%
Depreciation, Depletion And Amortization	$8.060M	$5.670M	$5.250M
YoY Change	57.12%	10.74%	1.16%
Cash From Operating Activities	$13.02M	$10.83M	$8.860M
YoY Change	-8.89%	9.62%	-14.89%
INVESTING ACTIVITIES
Capital Expenditures	-$62.32M	-$840.0K	-$6.310M
YoY Change	405.02%	-50.0%	-82.31%
Acquisitions
YoY Change
Other Investing Activities	$9.670M	$9.310M	$0.00
YoY Change	325.99%	-38.26%	-100.0%
Cash From Investing Activities	-$52.65M	$8.480M	-$6.320M
YoY Change	422.84%	-36.67%	-76.11%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	38.56M	-15.24M	-3.320M
YoY Change	-801.09%	-33.07%	-119.39%
NET CHANGE
Cash From Operating Activities	13.02M	10.83M	8.860M
Cash From Investing Activities	-52.65M	8.480M	-6.320M
Cash From Financing Activities	38.56M	-15.24M	-3.320M
Net Change In Cash	-1.070M	4.070M	-780.0K
YoY Change	-16.41%	714.0%	-172.9%
FREE CASH FLOW
Cash From Operating Activities	$13.02M	$10.83M	$8.860M
Capital Expenditures	-$62.32M	-$840.0K	-$6.310M
Free Cash Flow	$75.34M	$11.67M	$15.17M
YoY Change	182.91%	0.95%	-67.08%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2019	olp	Subsequent Disqualification Period If Failed To Qualify As Reit SubsequentDisqualificationPeriodIfFailedToQualifyAsREIT	P4Y
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	18736000
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19251000
CY2019Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:AccruedLiabilitiesCurrentAndNoncurrent
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000712770
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	001-09279
CY2019	dei	Entity Registrant Name EntityRegistrantName	ONE LIBERTY PROPERTIES, INC.
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-3147497
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	60 Cutter Mill Road
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Great Neck
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	11021
CY2019	dei	City Area Code CityAreaCode	516
CY2019	dei	Local Phone Number LocalPhoneNumber	466-3100
CY2019	dei	Security12b Title Security12bTitle	Common Stock
CY2019	dei	Trading Symbol TradingSymbol	OLP
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	true
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	450000000
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	20081682
CY2019Q4	us-gaap	Land Land	195320000
CY2018Q4	us-gaap	Land Land	204162000
CY2019Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	640517000
CY2018Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	624981000
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	835837000
CY2018Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	829143000
CY2019Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	135302000
CY2018Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	123684000
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	700535000
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	705459000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11034000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15204000
CY2018Q4	olp	Restricted Cash And Cash Equivalents Excluding Restricted Cash Included In Escrow Deposits And Other Assets And Receivables RestrictedCashAndCashEquivalentsExcludingRestrictedCashIncludedInEscrowDepositsAndOtherAssetsAndReceivables	1106000
CY2019Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	15037000
CY2018Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	13722000
CY2019Q4	olp	Unamortized Intangible Lease Assets UnamortizedIntangibleLeaseAssets	26068000
CY2018Q4	olp	Unamortized Intangible Lease Assets UnamortizedIntangibleLeaseAssets	26541000
CY2019Q4	olp	Escrow Deposits And Other Assets And Receivables EscrowDepositsAndOtherAssetsAndReceivables	10894000
CY2019Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	11061000
CY2018Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	10857000
CY2018Q4	olp	Escrow Deposits And Other Assets And Receivables EscrowDepositsAndOtherAssetsAndReceivables	8023000
CY2019Q4	us-gaap	Assets Assets	774629000
CY2018Q4	us-gaap	Assets Assets	780912000
CY2019Q4	us-gaap	Secured Debt SecuredDebt	435840000
CY2018Q4	us-gaap	Secured Debt SecuredDebt	418798000
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	10831000
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	29688000
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	8966000
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	8724000
CY2019Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	14587000
CY2018Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	11094000
CY2019Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	12421000
CY2018Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	14013000
CY2019Q4	us-gaap	Liabilities Liabilities	482645000
CY2018Q4	us-gaap	Liabilities Liabilities	482317000
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	12500000
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	12500000
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	25000000
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	25000000
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19251000
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	18736000
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	19251000
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	18736000
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	301517000
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	287250000
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1623000
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1890000
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-28382000
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-10730000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	290763000
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	297146000
CY2019Q4	us-gaap	Minority Interest MinorityInterest	1221000
CY2018Q4	us-gaap	Minority Interest MinorityInterest	1449000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	291984000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	298595000
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	774629000
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	780912000
CY2019	us-gaap	Revenues Revenues	84736000
CY2018	us-gaap	Revenues Revenues	79126000
CY2017	us-gaap	Revenues Revenues	75916000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	22026000
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	24155000
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	20993000
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19245000
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	12442000
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	11937000
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	11279000
CY2019	olp	Real Estate Operating Expenses RealEstateOperatingExpenses	14074000
CY2018	olp	Real Estate Operating Expenses RealEstateOperatingExpenses	11596000
CY2017	olp	Real Estate Operating Expenses RealEstateOperatingExpenses	11044000
CY2019	olp	Federal Excise And State Tax Paid And Or Accrued FederalExciseAndStateTaxPaidAndOrAccrued	348000
CY2018	olp	Federal Excise And State Tax Paid And Or Accrued FederalExciseAndStateTaxPaidAndOrAccrued	370000
CY2017	olp	Federal Excise And State Tax Paid And Or Accrued FederalExciseAndStateTaxPaidAndOrAccrued	481000
CY2017	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	153000
CY2019	us-gaap	Operating Expenses OperatingExpenses	48890000
CY2018	us-gaap	Operating Expenses OperatingExpenses	48058000
CY2017	us-gaap	Operating Expenses OperatingExpenses	43950000
CY2019	olp	Gain Loss On Disposition Of Real Estate GainLossOnDispositionOfRealEstate	4327000
CY2018	olp	Gain Loss On Disposition Of Real Estate GainLossOnDispositionOfRealEstate	5262000
CY2017	olp	Gain Loss On Disposition Of Real Estate GainLossOnDispositionOfRealEstate	9837000
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	40173000
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	36330000
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	41803000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	16000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1304000
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	826000
CY2018	olp	Gain Loss On Disposition Of Real Estate Unconsolidated Joint Venture GainLossOnDispositionOfRealEstateUnconsolidatedJointVenture	2057000
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-827000
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-201000
CY2019	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	8000
CY2018	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	720000
CY2017	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	407000
CY2019	us-gaap	Interest Expense InterestExpense	19831000
CY2018	us-gaap	Interest Expense InterestExpense	17862000
CY2017	us-gaap	Interest Expense InterestExpense	17609000
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	995000
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	985000
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	977000
CY2019	us-gaap	Profit Loss ProfitLoss	18544000
CY2018	us-gaap	Profit Loss ProfitLoss	21564000
CY2017	us-gaap	Profit Loss ProfitLoss	24249000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	533000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	899000
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	102000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	18011000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20665000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	24147000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19090000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18575000
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17944000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19119000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18588000
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18047000
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.05
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.28
CY2019	us-gaap	Profit Loss ProfitLoss	18544000
CY2018	us-gaap	Profit Loss ProfitLoss	21564000
CY2017	us-gaap	Profit Loss ProfitLoss	24249000
CY2019	olp	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassification	-3522000
CY2018	olp	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassification	2170000
CY2017	olp	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassification	1565000
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	398000
CY2018	olp	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Equity Earnings Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOciIntoEquityEarningsEffectivePortionNet	110000
CY2018	olp	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Company Share From Joint Venture OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesCompanyShareFromJointVenture	76000
CY2017	olp	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Company Share From Joint Venture OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesCompanyShareFromJointVenture	76000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3522000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1738000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1641000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	15022000
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	23302000
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	25890000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	533000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	899000
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	102000
CY2019	olp	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Noncontrolling Interest OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationNoncontrollingInterest	-9000
CY2018	olp	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Noncontrolling Interest OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationNoncontrollingInterest	3000
CY2017	olp	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Noncontrolling Interest OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationNoncontrollingInterest	7000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	14498000
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	22400000
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	25781000
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	291927000
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.74
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	32391000
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	5570000
CY2017	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	4534000
CY2017	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	20000
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	181000
CY2017	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	3133000
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1195000
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	3510000
CY2017	us-gaap	Profit Loss ProfitLoss	24249000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1641000
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	298502000
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.80
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	34652000
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	3138000
CY2018	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	5990000
CY2018	us-gaap	Profit Loss ProfitLoss	21564000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1738000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	298595000
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.80
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	35663000
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	5200000
CY2019	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	5712000
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	752000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	3870000
CY2019	us-gaap	Profit Loss ProfitLoss	18544000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3522000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	291984000
CY2019	us-gaap	Profit Loss ProfitLoss	18544000
CY2018	us-gaap	Profit Loss ProfitLoss	21564000
CY2017	us-gaap	Profit Loss ProfitLoss	24249000
CY2019	olp	Gain Loss On Sale Of Property Cash Flow Impact GainLossOnSaleOfPropertyCashFlowImpact	4327000
CY2018	olp	Gain Loss On Sale Of Property Cash Flow Impact GainLossOnSaleOfPropertyCashFlowImpact	5262000
CY2017	olp	Gain Loss On Sale Of Property Cash Flow Impact GainLossOnSaleOfPropertyCashFlowImpact	9837000
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	153000
CY2019	us-gaap	Straight Line Rent StraightLineRent	1547000
CY2018	us-gaap	Straight Line Rent StraightLineRent	1156000
CY2017	us-gaap	Straight Line Rent StraightLineRent	794000
CY2019	olp	Writeoff Of Unbilled Rent Receivable WriteoffOfUnbilledRentReceivable	-585000
CY2018	olp	Writeoff Of Unbilled Rent Receivable WriteoffOfUnbilledRentReceivable	-1514000
CY2017	olp	Writeoff Of Unbilled Rent Receivable WriteoffOfUnbilledRentReceivable	-362000
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	684000
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	291000
CY2019	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-914000
CY2018	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-1849000
CY2017	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-897000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	3870000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	3510000
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	3133000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	16000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1304000
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	826000
CY2018	olp	Gain Loss On Disposition Of Real Estate Unconsolidated Joint Venture GainLossOnDispositionOfRealEstateUnconsolidatedJointVenture	2057000
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	97000
CY2017	olp	Payments To Brokers For Commissions Classified As Operating Activities PaymentsToBrokersForCommissionsClassifiedAsOperatingActivities	168000
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2341000
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	656000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	22026000
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	24155000
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20993000
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	995000
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	985000
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	977000
CY2019	olp	Payments To Brokers For Commissions Classified As Operating Activities PaymentsToBrokersForCommissionsClassifiedAsOperatingActivities	523000
CY2018	olp	Payments To Brokers For Commissions Classified As Operating Activities PaymentsToBrokersForCommissionsClassifiedAsOperatingActivities	442000
CY2019	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	-129000
CY2018	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	1183000
CY2017	us-gaap	Increase Decrease In Operating Assets IncreaseDecreaseInOperatingAssets	-252000
CY2019	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-2687000
CY2018	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	1146000
CY2017	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	5885000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	36232000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	42646000
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	44429000
CY2019	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	49887000
CY2018	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	80290000
CY2017	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	43537000
CY2019	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	3514000
CY2018	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	7311000
CY2017	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	6565000
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	40761000
CY2018	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	27088000
CY2017	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	26301000
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	296000
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	11000
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	852000
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	357000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12925000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-59661000
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-23444000
CY2019	olp	Payments Of Amortization Of Mortgages Payable PaymentsOfAmortizationOfMortgagesPayable	13158000
CY2018	olp	Payments Of Amortization Of Mortgages Payable PaymentsOfAmortizationOfMortgagesPayable	11081000
CY2017	olp	Payments Of Amortization Of Mortgages Payable PaymentsOfAmortizationOfMortgagesPayable	10520000
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	19970000
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	24502000
CY2017	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	12936000
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	50310000
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	61733000
CY2017	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	21210000
CY2019	olp	Proceeds From Issuance Of Common Stock Net ProceedsFromIssuanceOfCommonStockNet	5200000
CY2018	olp	Proceeds From Issuance Of Common Stock Net ProceedsFromIssuanceOfCommonStockNet	3138000
CY2017	olp	Proceeds From Issuance Of Common Stock Net ProceedsFromIssuanceOfCommonStockNet	5570000
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	54550000
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	74500000
CY2017	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	47000000
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	73100000
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	53900000
CY2017	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	47600000
CY2019	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	5712000
CY2018	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	5990000
CY2017	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	4534000
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1443000
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1182000
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	160000
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	20000
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	752000
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	1195000
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	181000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	35421000
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	34421000
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	31704000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-28072000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	19080000
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-24767000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-4765000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	2065000
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-3782000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16733000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	14668000
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	18450000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11968000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16733000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	14668000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	19976000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	17783000
CY2017	us-gaap	Interest Paid Net InterestPaidNet	17777000
CY2019	olp	Non Cash Investing Activities Right Of Use Asset And Related Lease Liability NonCashInvestingActivitiesRightOfUseAssetAndRelatedLeaseLiability	5027000
CY2019	olp	Non Cash Investing Activities Purchase Accounting Allocation Intangible Lease Assets NonCashInvestingActivitiesPurchaseAccountingAllocationIntangibleLeaseAssets	4245000
CY2018	olp	Non Cash Investing Activities Purchase Accounting Allocation Intangible Lease Assets NonCashInvestingActivitiesPurchaseAccountingAllocationIntangibleLeaseAssets	4435000
CY2017	olp	Non Cash Investing Activities Purchase Accounting Allocation Intangible Lease Assets NonCashInvestingActivitiesPurchaseAccountingAllocationIntangibleLeaseAssets	4009000
CY2019	olp	Non Cash Investing Activities Purchase Accounting Allocation Intangible Lease Liabilities NonCashInvestingActivitiesPurchaseAccountingAllocationIntangibleLeaseLiabilities	-915000
CY2018	olp	Non Cash Investing Activities Purchase Accounting Allocation Intangible Lease Liabilities NonCashInvestingActivitiesPurchaseAccountingAllocationIntangibleLeaseLiabilities	-2508000
CY2017	olp	Non Cash Investing Activities Purchase Accounting Allocation Intangible Lease Liabilities NonCashInvestingActivitiesPurchaseAccountingAllocationIntangibleLeaseLiabilities	-158000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11034000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15204000
CY2018Q4	olp	Restricted Cash And Cash Equivalents Excluding Restricted Cash Included In Escrow Deposits And Other Assets And Receivables RestrictedCashAndCashEquivalentsExcludingRestrictedCashIncludedInEscrowDepositsAndOtherAssetsAndReceivables	1106000
CY2019Q4	olp	Restricted Cash Included In Escrow Deposits And Other Assets And Receivables RestrictedCashIncludedInEscrowDepositsAndOtherAssetsAndReceivables	934000
CY2018Q4	olp	Restricted Cash Included In Escrow Deposits And Other Assets And Receivables RestrictedCashIncludedInEscrowDepositsAndOtherAssetsAndReceivables	423000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11968000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16733000
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	291000
CY2019	us-gaap	Nature Of Operations NatureOfOperations	<p style="font-family:'Times New Roman';font-size:10pt;font-weight:bold;margin:0pt 0pt 6pt 0pt;">NOTE 1—ORGANIZATION AND BACKGROUND</p><p style="font-family:'Times New Roman';font-size:10pt;text-indent:18pt;margin:0pt;">One Liberty Properties, Inc. (“OLP”) was incorporated in 1982 in Maryland. OLP is a self-administered and self-managed real estate investment trust. OLP acquires, owns and manages a geographically diversified portfolio consisting primarily of industrial, retail, restaurant, health and fitness, and theater properties, many of which are subject to long-term net leases. As of December 31, 2019, OLP owns 126 properties, including four properties owned by consolidated joint ventures and four properties owned by unconsolidated joint ventures. The 126 properties are located in 31states.</p><p style="font-family:'Times New Roman';font-size:10pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;"></span></p>
CY2019Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	126
CY2019Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	126
CY2019Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	31
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman';font-size:10pt;font-style:italic;font-weight:bold;margin:0pt 0pt 6pt 0pt;">Use of Estimates</p><p style="font-family:'Times New Roman';font-size:10pt;text-indent:18pt;margin:0pt 0pt 6pt 0pt;">The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.</p><p style="font-family:'Times New Roman';font-size:10pt;text-indent:18pt;margin:0pt 0pt 12pt 0pt;"><span style="white-space:pre-wrap;">Management believes that the estimates and assumptions that are most important to the portrayal of the Company’s consolidated financial condition and results of operations, in that they require management’s most difficult, subjective or complex judgments, form the basis of the accounting policies deemed to be most significant to the Company. These significant accounting policies relate to revenues and the value of the Company’s real estate portfolio, including investments in unconsolidated joint ventures. Management believes its estimates and assumptions related to these significant accounting policies are appropriate under the circumstances; however, should future events or occurrences result in unanticipated consequences, there could be a material impact on the Company’s future consolidated financial condition or results of operations.</span></p>
CY2019Q4	olp	Real Estate Taxes Insurance And Other Escrows RealEstateTaxesInsuranceAndOtherEscrows	934000
CY2018Q4	olp	Real Estate Taxes Insurance And Other Escrows RealEstateTaxesInsuranceAndOtherEscrows	423000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	22026000
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	24155000
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	20993000
CY2019Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	3799000
CY2018Q4	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	3246000
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="font-family:'Times New Roman';font-size:10pt;font-style:italic;font-weight:bold;margin:0pt 0pt 6pt 0pt;">Reclassifications</p><p style="font-family:'Times New Roman';font-size:10pt;text-indent:18pt;margin:0pt 0pt 12pt 0pt;">Certain amounts previously reported in the consolidated financial statements have been reclassified in the accompanying consolidated financial statements to conform to the current year’s presentation. Such reclassifications primarily relate to the presentation on the consolidated statement of income for the years ended 2018 and 2017 of (i) rental income, net, due to the adoption of a new lease accounting pronouncement (see Note 3), (ii) leasehold rent being included as part of Real estate expenses and (iii) prepayment costs on debt being presented separately from mortgage interest expense.</p>
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:'Times New Roman';font-size:10pt;font-style:italic;font-weight:bold;margin:0pt 0pt 6pt 0pt;">Concentration of Credit Risk</p><p style="font-family:'Times New Roman';font-size:10pt;text-indent:18pt;margin:0pt 0pt 6pt 0pt;">The Company maintains cash accounts at various financial institutions. While the Company attempts to limit any financial exposure, substantially all of its deposit balances exceed federally insured limits. The Company has not experienced any losses on such accounts.</p><p style="font-family:'Times New Roman';font-size:10pt;text-indent:18pt;margin:0pt 0pt 6pt 0pt;">The Company’s properties are located in 31 states. During 2019, 2018 and 2017, 9.2%, 9.3% and 13.2% of total revenues, respectively, were attributable to real estate investments located in Texas which is the only state in which real estate investments contributed more than 10% to the Company’s total revenues in any of the past three years.</p><p style="font-family:'Times New Roman';font-size:10pt;text-indent:18pt;margin:0pt 0pt 11pt 0pt;">No tenant contributed over 10% to the Company’s total revenues during 2019, 2018 and 2017.</p>
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	684000
CY2019Q1	us-gaap	Lease Practical Expedients Package LeasePracticalExpedientsPackage	true
CY2019	us-gaap	Lessor Operating Lease Existence Of Option To Extend LessorOperatingLeaseExistenceOfOptionToExtend	true
CY2019	us-gaap	Lessor Operating Lease Existence Of Option To Terminate LessorOperatingLeaseExistenceOfOptionToTerminate	true
CY2019Q4	us-gaap	Lease Practical Expedient Lessor Single Lease Component LeasePracticalExpedientLessorSingleLeaseComponent	true
CY2019	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	70788000
CY2018	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	65042000
CY2017	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	63425000
CY2019	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	12084000
CY2018	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	11863000
CY2017	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	11594000
CY2019	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	82872000
CY2018	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	76905000
CY2017	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	75019000
CY2019	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-914000
CY2018	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-1849000
CY2017	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-897000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	70252000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	69586000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	60988000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	52217000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	43585000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	176622000
CY2019Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	473250000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	66959000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	66691000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	65130000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	56444000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	47644000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	208923000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	511791000
CY2019Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	15037000
CY2018Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	13722000
CY2019	olp	Deferred Rent Receivable Period During Which Amount Of Rent To Be Billed And Received DeferredRentReceivablePeriodDuringWhichAmountOfRentToBeBilledAndReceived	P16Y
CY2019	olp	Straight Line Rent Receivable Written Off Relating To Property Sold StraightLineRentReceivableWrittenOffRelatingToPropertySold	182000
CY2018	olp	Straight Line Rent Receivable Written Off Relating To Property Sold StraightLineRentReceivableWrittenOffRelatingToPropertySold	45000
CY2017	olp	Straight Line Rent Receivable Written Off Relating To Property Sold StraightLineRentReceivableWrittenOffRelatingToPropertySold	105000
CY2019Q4	olp	Deferred Rent Payables DeferredRentPayables	662000
CY2018Q4	olp	Deferred Rent Payables DeferredRentPayables	0
CY2019	olp	Deferred Rent Payables Period During Which Amount Of Rent To Be Billed And Payables DeferredRentPayablesPeriodDuringWhichAmountOfRentToBeBilledAndPayables	P22Y
CY2019	olp	Straight Line Rent Receivable Written Off Relating To Tenant Filing Bankruptcy Or Going Concern Issues StraightLineRentReceivableWrittenOffRelatingToTenantFilingBankruptcyOrGoingConcernIssues	548000
CY2018	olp	Straight Line Rent Receivable Written Off Relating To Tenant Filing Bankruptcy Or Going Concern Issues StraightLineRentReceivableWrittenOffRelatingToTenantFilingBankruptcyOrGoingConcernIssues	1440000
CY2017	olp	Straight Line Rent Receivable Written Off Relating To Tenant Filing Bankruptcy Or Going Concern Issues StraightLineRentReceivableWrittenOffRelatingToTenantFilingBankruptcyOrGoingConcernIssues	362000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	510000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	511000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	506000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	507000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	557000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	3741000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6332000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1529000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	4803000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Remainder Of Fiscal Year OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear	454000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	127000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	47000
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	628000
CY2019	olp	Payments To Acquire Real Estate Excluding Acquisition Costs PaymentsToAcquireRealEstateExcludingAcquisitionCosts	49250000
CY2019Q4	olp	Real Estate Acquisition Cost Capitalized RealEstateAcquisitionCostCapitalized	637000
CY2018	olp	Payments To Acquire Real Estate Excluding Acquisition Costs PaymentsToAcquireRealEstateExcludingAcquisitionCosts	79503000
CY2018Q4	olp	Real Estate Acquisition Cost Capitalized RealEstateAcquisitionCostCapitalized	787000
CY2019	us-gaap	Mortgage Loans On Real Estate New Mortgage Loans MortgageLoansOnRealEstateNewMortgageLoans	50310000
CY2018	us-gaap	Mortgage Loans On Real Estate New Mortgage Loans MortgageLoansOnRealEstateNewMortgageLoans	15563000
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Land BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand	7461000
CY2019Q4	olp	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Buildings And Improvements BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildingsAndImprovements	39096000
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	4245000
CY2019Q4	olp	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Lease Liability BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleLeaseLiability	915000
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	49887000
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Land BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand	11318000
CY2018Q4	olp	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Buildings And Improvements BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildingsAndImprovements	67044000
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	4435000
CY2018Q4	olp	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Lease Liability BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleLeaseLiability	2507000
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	80290000
CY2019	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P7Y7M6D
CY2019	olp	Acquired Finite Lived Intangible Liabilities Weighted Average Amortization Period AcquiredFiniteLivedIntangibleLiabilitiesWeightedAverageAmortizationPeriod	P9Y9M18D
CY2018	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P6Y9M18D
CY2018	olp	Acquired Finite Lived Intangible Liabilities Weighted Average Amortization Period AcquiredFiniteLivedIntangibleLiabilitiesWeightedAverageAmortizationPeriod	P11Y4M24D
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	19904000
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	16503000
CY2019Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	7502000
CY2018Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	7378000
CY2019	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-914000
CY2018	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-1849000
CY2017	us-gaap	Amortization Of Above And Below Market Leases AmortizationOfAboveAndBelowMarketLeases	-897000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4039000
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7175000
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4984000
CY2018	olp	Write Off Of Tenant Origination Costs WriteOffOfTenantOriginationCosts	2743000
CY2017	olp	Write Off Of Tenant Origination Costs WriteOffOfTenantOriginationCosts	884000
	olp	Number Of Leased Properties With Tenants In Bankruptcy NumberOfLeasedPropertiesWithTenantsInBankruptcy	4
CY2019	olp	Gross Proceeds From Sale Of Real Estate GrossProceedsFromSaleOfRealEstate	41891000
CY2019	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	4327000
CY2018	olp	Gross Proceeds From Sale Of Real Estate GrossProceedsFromSaleOfRealEstate	27659000
CY2018	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	5262000
CY2017	olp	Gross Proceeds From Sale Of Real Estate GrossProceedsFromSaleOfRealEstate	27050000
CY2017	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	9837000
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	13000
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2019	us-gaap	Profit Loss ProfitLoss	18544000
CY2018	us-gaap	Profit Loss ProfitLoss	21564000
CY2017	us-gaap	Profit Loss ProfitLoss	24249000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	533000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	899000
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	102000
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1227000
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1173000
CY2017	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1072000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16784000
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19492000
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	23075000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19090000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18575000
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17944000
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	29000
CY2018	olp	Common Stock Dividends Cash Paid Capital Gain Percentage CommonStockDividendsCashPaidCapitalGainPercentage	0.12
CY2017	olp	Common Stock Dividends Cash Paid Capital Gain Percentage CommonStockDividendsCashPaidCapitalGainPercentage	0.17
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	103000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19119000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18588000
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18047000
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.05
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.28
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.80
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.80
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.74
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9037000
CY2019	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	220000
CY2018	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	243000
CY2017	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	198000
CY2019	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	180120
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5392000
CY2019	olp	Payment Of Commissions On Sale Of Shares PaymentOfCommissionsOnSaleOfShares	54000
CY2019	olp	Payment Of Offering Costs On Sale Of Shares PaymentOfOfferingCostsOnSaleOfShares	192000
CY2018	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	126300
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3245000
CY2018	olp	Payment Of Commissions On Sale Of Shares PaymentOfCommissionsOnSaleOfShares	33000
CY2018	olp	Payment Of Offering Costs On Sale Of Shares PaymentOfOfferingCostsOnSaleOfShares	107000
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	463867
CY2019	olp	Percentage Of Distributions Representing Return Of Capital To Shareholders PercentageOfDistributionsRepresentingReturnOfCapitalToShareholders	0.27
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2019	olp	Dividends Declared Reconciliation DividendsDeclaredReconciliation	35663000
CY2018	olp	Dividends Declared Reconciliation DividendsDeclaredReconciliation	34652000
CY2017	olp	Dividends Declared Reconciliation DividendsDeclaredReconciliation	32393000
CY2019	olp	Dividend Reinvestment Plan Common Stock Discount On Shares DividendReinvestmentPlanCommonStockDiscountOnShares	247000
CY2018	olp	Dividend Reinvestment Plan Common Stock Discount On Shares DividendReinvestmentPlanCommonStockDiscountOnShares	313000
CY2017	olp	Dividend Reinvestment Plan Common Stock Discount On Shares DividendReinvestmentPlanCommonStockDiscountOnShares	252000
CY2019	olp	Dividends Before Adjustments For Previous And Current Year DividendsBeforeAdjustmentsForPreviousAndCurrentYear	35910000
CY2018	olp	Dividends Before Adjustments For Previous And Current Year DividendsBeforeAdjustmentsForPreviousAndCurrentYear	34965000
CY2017	olp	Dividends Before Adjustments For Previous And Current Year DividendsBeforeAdjustmentsForPreviousAndCurrentYear	32645000
CY2018	olp	Dividends Designated To Previous Year DividendsDesignatedToPreviousYear	10263000
CY2017	olp	Dividends Designated To Previous Year DividendsDesignatedToPreviousYear	11916000
CY2019	olp	Dividends Designated To Following Year DividendsDesignatedToFollowingYear	8976000
CY2018	olp	Dividends Designated To Following Year DividendsDesignatedToFollowingYear	549000
CY2019	olp	Return Of Capital ReturnOfCapital	9828000
CY2019	olp	Dividends Designated From Prior Year DividendsDesignatedFromPriorYear	549000
CY2017	olp	Dividends Designated From Following Year DividendsDesignatedFromFollowingYear	10263000
CY2019	olp	Dividend Paid Deduction From Taxable Income DividendPaidDeductionFromTaxableIncome	17655000
CY2018	olp	Dividend Paid Deduction From Taxable Income DividendPaidDeductionFromTaxableIncome	24153000
CY2017	olp	Dividend Paid Deduction From Taxable Income DividendPaidDeductionFromTaxableIncome	30992000
CY2019Q1	us-gaap	Revenues Revenues	21155000
CY2019Q2	us-gaap	Revenues Revenues	20719000
CY2019Q3	us-gaap	Revenues Revenues	20414000
CY2019Q4	us-gaap	Revenues Revenues	22448000
CY2019	us-gaap	Revenues Revenues	84736000
CY2019Q2	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	1099000
CY2019Q3	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	2544000
CY2019Q4	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	684000
CY2019	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	4327000
CY2019Q1	us-gaap	Profit Loss ProfitLoss	4011000
CY2019Q2	us-gaap	Profit Loss ProfitLoss	4558000
CY2019Q3	us-gaap	Profit Loss ProfitLoss	5097000
CY2019Q4	us-gaap	Profit Loss ProfitLoss	4878000
CY2019	us-gaap	Profit Loss ProfitLoss	18544000
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	3971000
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	4112000
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	5118000
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	4810000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	18011000
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18894000
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19023000
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19191000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19090000
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18993000
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19129000
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19239000
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19266000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19119000
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2018Q1	us-gaap	Revenues Revenues	19534000
CY2018Q2	us-gaap	Revenues Revenues	19752000
CY2018Q3	us-gaap	Revenues Revenues	19570000
CY2018Q4	us-gaap	Revenues Revenues	20270000
CY2018	us-gaap	Revenues Revenues	79126000
CY2018Q1	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	2408000
CY2018Q3	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	4585000
CY2018Q4	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	-1731000
CY2018	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	5262000
CY2018Q1	us-gaap	Profit Loss ProfitLoss	6653000
CY2018Q2	us-gaap	Profit Loss ProfitLoss	4546000
CY2018Q3	us-gaap	Profit Loss ProfitLoss	10182000
CY2018Q4	us-gaap	Profit Loss ProfitLoss	183000
CY2018	us-gaap	Profit Loss ProfitLoss	21564000
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	5851000
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	4517000
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	10147000
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	150000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	20665000
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18396000
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18519000
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18646000
CY2018Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18733000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18575000
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18434000
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18593000
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18705000
CY2018Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18748000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18588000
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.53
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.01
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2019Q4	olp	Real Estate Federal Income Tax Basis Difference Amount RealEstateFederalIncomeTaxBasisDifferenceAmount	16861000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	829143000
CY2017Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	775327000
CY2016Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	748065000
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.01
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.05
CY2019Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	440278000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	195320000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	602532000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements	37985000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	195320000
CY2019Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	640517000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	835837000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	135302000
CY2019	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	49669000
CY2018	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	86117000
CY2017	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	47207000
CY2019	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	42975000
CY2018	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	32301000
CY2017	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	19792000
CY2017	us-gaap	Sec Schedule Iii Real Estate Writedown Or Reserve Amount SECScheduleIIIRealEstateWritedownOrReserveAmount	153000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	835837000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	829143000
CY2017Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	775327000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	123684000
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	108953000
CY2016Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	96852000
CY2019	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	17534000
CY2018	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	16615000
CY2017	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	15689000
CY2019	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	5916000
CY2018	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	1884000
CY2017	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	3588000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	135302000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	123684000
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	108953000

Files In Submission

Name	View Source	Status
0001104659-20-033752-index-headers.html	Edgar Link	pending
0001104659-20-033752-index.html	Edgar Link	pending
0001104659-20-033752.txt	Edgar Link	pending
0001104659-20-033752-xbrl.zip	Edgar Link	pending
ex-10d11.htm	Edgar Link	pending
ex-21d1.htm	Edgar Link	pending
ex-23d1.htm	Edgar Link	pending
ex-31d1.htm	Edgar Link	pending
ex-31d2.htm	Edgar Link	pending
ex-32d1.htm	Edgar Link	pending
ex-32d2.htm	Edgar Link	pending
ex-4d5.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
olp-20191231.xsd	Edgar Link	pending
olp-20191231x10k4d0eda.htm	Edgar Link	pending
olp-20191231x10k4d0eda_htm.xml	Edgar Link	completed
olp-20191231_cal.xml	Edgar Link	unprocessable
olp-20191231_def.xml	Edgar Link	unprocessable
olp-20191231_lab.xml	Edgar Link	unprocessable
olp-20191231_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
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R80.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$OLP
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2018 Q4 Form 10-K Financial Statement

#000110465920033752 Filed on March 16, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OLP ONE LIBERTY PROPERTIES INC Stock $olp

2018 Q4 Form 10-K Financial Statement

#000110465920033752 Filed on March 16, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OLP
ONE LIBERTY PROPERTIES INC Stock $olp