XML 40 R18.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Common Stock Cash Dividend | 3 Months Ended
--- | ---
Mar. 31, 2013
Common Stock Cash Dividend |
Common Stock Cash Dividend | Note 9 - Common Stock Cash Dividend On March 13, 2013, the Board of Directors declared a quarterly cash dividend of $.35 per share on the Company’s common stock, totaling $5,312,000. The quarterly dividend was paid on April 3, 2013 to stockholders of record on March 25, 2013.

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
- Details
Name: | us-gaap_DividendsCommonStockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration