XML 67 R54.htm IDEA: XBRL DOCUMENT v3.19.1

ALLOWANCE FOR DOUBTFUL ACCOUNTS AND BAD DEBT EXPENSE (Details)	1 Months Ended	12 Months Ended			36 Months Ended
	Jul. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($) property	Dec. 31, 2016 USD ($)	Dec. 31, 2018 USD ($) tenant
ALLOWANCE FOR DOUBTFUL ACCOUNTS AND BAD DEBT EXPENSE
Aggregate bad debt expense relating to rental income, tenant reimbursements and unbilled rent receivable				$ 105,000
Balance in allowance for doubtful accounts		$ 0	$ 0		$ 0
Bad debt expense		684,000	$ 291,000	$ 98,000
Number of tenants in bankruptcy | tenant					5
Write-off of unbilled rent receivable	$ 74,000
Number of properties sold related to bad debt expense | property			3
Impairment loss		$ 0	$ 153,000
Number of remaining properties have no impairment | property		2
Net book value of properties		$ 18,143,000			$ 18,143,000

X

- References

No definition available.

+ Details

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

X

- Definition

Net book value of properties with bad debt and no impairment charge.

+ References

No definition available.

+ Details

Name:	olp_NetBookValueOfPropertiesWithBadDebtAndNoImpairment
Namespace Prefix:	olp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of properties which were sold related to bad debt expense.

+ References

No definition available.

+ Details

Name:	olp_NumberOfPropertiesSoldRelatedToBadDebtExpense
Namespace Prefix:	olp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of remaining properties which has no impairment.

+ References

No definition available.

+ Details

Name:	olp_NumberOfRemainingPropertiesHaveNoImpairment
Namespace Prefix:	olp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of tenants who have filed for bankruptcy.

+ References

No definition available.

+ Details

Name:	olp_NumberOfTenantsInBankruptcy
Namespace Prefix:	olp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Representing aggregate provision for doubtful accounts of rental income, tenant reimbursements and unbilled rent receivable.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the amount of unbilled rent receivable written off during the period.

+ References

No definition available.

+ Details

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

X

- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

+ Details

Name:	us-gaap_ImpairmentOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.5)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044

+ Details

Name:	us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration