Consolidated Statements of Operations (Parenthetical)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
General partner allocation percentage	1.00%	1.00%

Refers to percentage of gerereal partners allocation.

No definition available.

Name:	fpf_GeneralPartnerAllocationPercentage
Namespace Prefix:	fpf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration