XML 27 R16.htm IDEA: XBRL DOCUMENT
v3.23.2

INVESTMENT IN UNCONSOLIDATED JOINT VENTURES | 6 Months Ended
--- | ---
Jun. 30, 2023
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES | NOTE 7 – INVESTMENT IN UNCONSOLIDATED JOINT VENTURES ​ As of June 30, 2023 and December 31, 2022, the Company participated in three unconsolidated joint ventures, each of which owns and operates one property; the Company’s equity investment in these ventures totaled $10,521,000 and $10,400,000, respectively. The Company recorded equity in earnings of $60,000 and $145,000 for the three and six months ended June 30, 2023, respectively, and $112,000 and $228,000 for the three and six months ended June 30, 2022, respectively. ​ As of June 30, 2023 and December 31, 2022, MCB and the Company are partners in an unconsolidated joint venture in which the Company’s equity investment is approximately $9,019,000 and $8,963,000, respectively.

X
- Definition This item represents disclosure of information related to investments in unconsolidated joint ventures. + References No definition available. + Details
Name: | olp_InvestmentsInUnconsolidatedJointVentureTextBlock
Namespace Prefix: | olp_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | olp_InvestmentsInUnconsolidatedJointVenturesAbstract
Namespace Prefix: | olp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration