XML 56 R21.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Common Stock Cash Dividend | 6 Months Ended
--- | ---
Jun. 30, 2015
Common Stock Cash Dividend |
Common Stock Cash Dividend | Note 12 - Common Stock Cash Dividend On June 11, 2015, the Board of Directors declared a quarterly cash dividend of $.39 per share on the Company’s common stock, totaling $6,421,000. The quarterly dividend was paid on July 6, 2015 to stockholders of record on June 24, 2015.

X
- Definition This element represents the disclosure in respect of the quarterly cash dividend that is declared on common stock. + References No definition available. + Details
Name: | olp_CommonStockDividendDistributionDisclosureTextBlock
Namespace Prefix: | olp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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