Subsequent Events	6 Months Ended
Mar. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	(15) Subsequent Events. During the 2nd quarter, we entered into an agreement with a substantial Baltimore development company (St. John Properties, Inc.) to jointly develop the remaining lands of our Windlass Run Business Park. The 50/50 partnership initially calls for FRP to combine its 25 acres (valued at $7,500,000) with St. John Properties’ adjacent 10 acres fronting on a major state highway (valued at $3,239,536) resulting in an initial cash distribution of $2,130,232 to FRP on or about May, 2016. Thereafter, the venture will jointly develop the combined properties into a multi-building business park to consist of approximately 329,000 square feet of single story office space.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

No definition available.

Name:	us-gaap_SubsequentEventsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration