XML 62 R47.htm IDEA: XBRL DOCUMENT v3.25.0.1

SIGNIFICANT ACCOUNTING POLICIES - Escrows (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Escrows
Real estate taxes, insurance and other escrows	$ 3,166,000	$ 3,162,000

X

- Definition

Represents the amounts for real estate taxes, insurance and other escrows related to real estate in escrow, deposits and other assets and receivables.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_RestrictedCashAndInvestmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration