| Line |
Label |
Object Class (Data type) |
Period Type |
Balance |
Report Element Name |
| 1 |
Investment [Table] |
Table |
|
|
gaap:InvestmentTable |
| 2 |
Legal Entity [Axis] |
Axis |
|
|
frm:LegalEntityAxis |
| 3 |
Consolidated Entity [Member] |
Member |
|
|
frm:ConsolidatedEntityMember |
| 4 |
Report Date [Axis] |
Axis |
|
|
frm:ReportDateAxis |
| 5 |
Reported as of March 18, 2011 [Member] |
Member |
|
|
company:ReportedAsOfMarch182011Member |
| 6 |
Reporting Scenario [Axis] |
Axis |
|
|
frm:ReportingScenarioAxis |
| 7 |
Actual [Member] |
Member |
|
|
frm:ActualMember |
| 8 |
Investment, Description [Axis] |
Axis |
|
|
gaap:InvestmentDescriptionAxis |
| 9 |
All Investments [Member] |
Member |
|
|
gaap:AllInvestmentsMember |
| 10 |
Treasury Bills, 3.4 %, 7/1/2010 [Member] |
Member |
|
|
company:TreasuryBills3.4712010Member |
| 11 |
Treasury Bills, 3.3 %, 7/1/2011 [Member] |
Member |
|
|
company:TreasuryBills3.3712011Member |
| 12 |
Investment, Term [Axis] |
Axis |
|
|
gaap:InvestmentTermAxis |
| 13 |
All Investment Terms [Member] |
Member |
|
|
gaap:AllInvestmentTermsMember |
| 14 |
Short-Term [Member] |
Member |
|
|
gaap:ShortTermMember |
| 15 |
Long-Term [Member] |
Member |
|
|
gaap:LongTermMember |
| 16 |
Investment, Country [Axis] |
Axis |
|
|
gaap:InvestmentCountryAxis |
| 17 |
All Investment Countries [Member] |
Member |
|
|
gaap:AllInvestmentCountriesMember |
| 18 |
USA [Member] |
Member |
|
|
gaap:USAMember |
| 19 |
Canada [Member] |
Member |
|
|
gaap:CanadaMember |
| 20 |
Investment, Type [Axis] |
Axis |
|
|
gaap:InvestmentTypeAxis |
| 21 |
All Investment Types [Member] |
Member |
|
|
gaap:AllInvestmentTypesMember |
| 22 |
Investment in Governmental Entities [Member] |
Member |
|
|
gaap:InvestmentInGovernmentalEntitiesMember |
| 23 |
Investment in Nongovernmental Entities [Member] |
Member |
|
|
gaap:InvestmentInNongovernmentalEntitiesMember |
| 24 |
Investment, Entity [Axis] |
Axis |
|
|
gaap:InvestmentEntityAxis |
| 25 |
All Investment Entities [Member] |
Member |
|
|
gaap:AllInvestmentEntitiesMember |
| 26 |
US Federal Government [Member] |
Member |
|
|
gaap:USFederalGovernmentMember |
| 27 |
State and Local Government [Member] |
Member |
|
|
gaap:StateAndLocalGovernmentMember |
| 28 |
Investment, Moody's Rating [Axis] |
Axis |
|
|
gaap:InvestmentMoodysRatingAxis |
| 29 |
All Moody's Ratings [Member] |
Member |
|
|
gaap:AllMoodysRatingsMember |
| 30 |
A+++ [Member] |
Member |
|
|
gaap:APlusPlusPlusMember |
| 31 |
A-- [Member] |
Member |
|
|
gaap:AMinusMinusMember |
| 32 |
Investment, S&P Rating [Axis] |
Axis |
|
|
gaap:InvestmentSPRatingAxis |
| 33 |
All S&P Ratings [Member] |
Member |
|
|
gaap:AllSPRatingsMember |
| 34 |
AAA [Member] |
Member |
|
|
gaap:AAAMember |
| 35 |
AA [Member] |
Member |
|
|
gaap:AAMember |
| 36 |
Investment [Line Items] |
LineItems |
|
|
gaap:InvestmentLineItems |
| 37 |
Investment [Hierarchy] |
Abstract |
|
|
gaap:InvestmentHierarchy |
| 38 |
Investment, Shares |
Concept (Shares) |
As Of |
|
gaap:InvestmentShares |
| 39 |
Investments, at Cost |
Concept (Monetary) |
As Of |
Debit |
gaap:InvestmentsAtCost |