XML 18 R50.htm IDEA: XBRL DOCUMENT
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Fair Value Measurements on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
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Fair Value On Recurring Basis [Line Items] |  |
Fair Value of Liabilities | $ (1,136) | $ (1,667)
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Series F Preferred Stock [Member] |  |
Fair Value On Recurring Basis [Line Items] |  |
Fair Value of Liabilities |  |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Series F Preferred Stock [Member] |  |
Fair Value On Recurring Basis [Line Items] |  |
Fair Value of Liabilities |  |
Fair Value, Measurements, Recurring [Member] | Unobservable Inputs (Level 3) [Member] | Series F Preferred Stock [Member] |  |
Fair Value On Recurring Basis [Line Items] |  |
Fair Value of Liabilities | $ (1,136) | $ (1,667)

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- Details
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Namespace Prefix: | fr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant