Earnings Per Share (Details Textual) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share (Textual) [Abstract]
Weighted average shares of non-vested restricted stock excluded from basic earnings per share	285	266

Number of weighted average shares of non-vested restricted stock excluded from basic earnings per share.

No definition available.

Name:	frp_WeightedAverageSharesOfNonVestedRestrictedStockExcludedFromBasicEarningsPerShare
Namespace Prefix:	frp_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration