Investments in and Advances to Other Real Estate Partnerships - Condensed Combined Balance Sheets (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Schedule Of Condensed Consolidating Balance Sheets [Line Items]
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	$ 1,435	$ 3,050

The cumulative amount of depreciation and amortization for the carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

No definition available.

Name:	frfi_RealEstateHeldForSaleAccumulatedDepreciationAndAmortization
Namespace Prefix:	frfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant