2.4.0.806022 - Disclosure - Fair Value (Details 2)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$BalanceAsOf_28Jun2013http://www.sec.gov/CIK0000815917instant2013-06-28T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$BalanceAsOf_31Dec2012http://www.sec.gov/CIK0000815917instant2012-12-31T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 2jnfc_EstimatedFairValuesOfLongTermDebtAndLiabilitiesSubordinatedToClaimsOfGeneralCreditorsAbstractjnfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Estimated fair values of long term debt and liabilities subordinated to claims of general creditors2false 3us-gaap_LongTermDebtFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse53900005390USD$falsetruefalse2truefalsefalse60910006091USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.No definition available.false2Long-term debt3false 3us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligationsus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse5000000050000falsefalsefalse2truefalsefalse103396000103396falsefalsefalsexbrli:monetaryItemTypemonetaryFair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 false2Liabilities subordinated to claims of general creditors4false 3jnfc_EstimatedFairValueOfLongTermDebtAndLiabilitiesSubordinatedToClaimsOfGeneralCreditorsjnfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse5539000055390USD$falsetruefalse2truefalsefalse109487000109487USD$falsetruefalsexbrli:monetaryItemTypemonetaryEstimated fair values of long term debt and liabilities subordinated to claims of general creditors.No definition available.true2TotalfalseFair Value (Details 2) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://edwardjones.com/role/FairValueDetails224