XML 29 R77.htm IDEA: XBRL DOCUMENT v3.20.1

INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
INCOME TAXES
Period of disqualification of REIT status	4 years
Percentage of total distributions representing a return of capital to shareholders	27.00%
Percentage of total distributions representing capital gains distributions to shareholders		12.00%	17.00%
Reconciliation between dividends declared with the dividends paid deduction
Dividends declared	$ 35,663	$ 34,652	$ 32,393
Dividend reinvestment plan	247	313	252
Dividends before adjustments	35,910	34,965	32,645
Less: Spillover dividends designated to previous year		(10,263)	(11,916)
Less: Spillover dividends designated to following year	(8,976)	(549)
Less: Return of capital	(9,828)
Plus: Dividends designated from prior year	549
Plus: Dividends designated from following year			10,263
Dividends paid deduction	$ 17,655	$ 24,153	$ 30,992
Maximum
Reconciliation between dividends declared with the dividends paid deduction
Percentage of discount on common stock purchased through the dividend reinvestment plan	5.00%	5.00%	5.00%

X

- Definition

Represents the percentage of aggregate cash distributions for dividends during the period, treated as capital gains for federal tax purposes.

+ References

No definition available.

+ Details

Name:	olp_CommonStockDividendsCashPaidCapitalGainPercentage
Namespace Prefix:	olp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the amount of dividends paid to stockholders that are deducted from the entity's taxable income.

+ References

No definition available.

+ Details

Name:	olp_DividendPaidDeductionFromTaxableIncome
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount of discount on common stock purchased through the dividend reinvestment plan.

+ References

No definition available.

+ Details

Name:	olp_DividendReinvestmentPlanCommonStockDiscountOnShares
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount of dividends before adjustments for dividends designated to previous year and designated from following year.

+ References

No definition available.

+ Details

Name:	olp_DividendsBeforeAdjustmentsForPreviousAndCurrentYear
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Dividends declared for reconciliation to dividends paid deduction.

+ References

No definition available.

+ Details

Name:	olp_DividendsDeclaredReconciliation
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount of dividends designated from the following year.

+ References

No definition available.

+ Details

Name:	olp_DividendsDesignatedFromFollowingYear
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount of dividends designated from the prior year.

+ References

No definition available.

+ Details

Name:	olp_DividendsDesignatedFromPriorYear
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount of dividends designated to the following year.

+ References

No definition available.

+ Details

Name:	olp_DividendsDesignatedToFollowingYear
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the amount of dividends designated to the previous year.

+ References

No definition available.

+ Details

Name:	olp_DividendsDesignatedToPreviousYear
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	olp_IncomeTaxLineItems
Namespace Prefix:	olp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of discount from market price on common stock purchased through the dividend reinvestment plan.

+ References

No definition available.

+ Details

Name:	olp_PercentageOfDiscountOnCommonStockPurchasedThroughDividendReinvestmentPlan
Namespace Prefix:	olp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of distributions which represent a return of capital to shareholders.

+ References

No definition available.

+ Details

Name:	olp_PercentageOfDistributionsRepresentingReturnOfCapitalToShareholders
Namespace Prefix:	olp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	olp_ReconciliationOfCashDividendsPaidToDividendsPaidDeductionAbstract
Namespace Prefix:	olp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the amount of capital returned.

+ References

No definition available.

+ Details

Name:	olp_ReturnOfCapital
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the subsequent period during which the entity would be disqualified as a real estate investment trust, if during any tax year the entity fails to qualify as a real estate investment trust.

+ References

No definition available.

+ Details

Name:	olp_SubsequentDisqualificationPeriodIfFailedToQualifyAsREIT
Namespace Prefix:	olp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: