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Annual Fund Operating Expenses (Vanguard New Jersey Long-Term Tax-Exempt Fund Retail)
Vanguard New Jersey Long-Term Tax-Exempt Fund
Vanguard New Jersey Long-Term Tax-Exempt Fund - Investor Shares
12/1/2013 - 11/30/2014
Vanguard New Jersey Long-Term Tax-Exempt Fund
Vanguard New Jersey Long-Term Tax-Exempt Fund - Admiral Shares
12/1/2013 - 11/30/2014
Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)    
Management Fees 0.17%rr_ManagementFeesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000002901Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007964Member
0.10%rr_ManagementFeesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000002901Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007965Member
12b-1 Distribution Fee none none
Other Expenses 0.03%rr_OtherExpensesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000002901Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007964Member
0.02%rr_OtherExpensesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000002901Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007965Member
Total Annual Fund Operating Expenses 0.20%rr_NetExpensesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000002901Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007964Member
0.12%rr_NetExpensesOverAssets
/ dei_LegalEntityAxis
= vanguard_S000002901Member
/ rr_ProspectusShareClassAxis
= vanguard_C000007965Member