2.4.0.81001501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)truefalsefalse1false falsefalseI2014Q1_us-gaap_PartnerCapitalComponentsAxis_ck0001405621_ClassUnitsMemberhttp://www.sec.gov/CIK0001405621instant2013-05-31T00:00:000001-01-01T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli02false falsefalseI2013Q4_us-gaap_PartnerCapitalComponentsAxis_ck0001405621_ClassUnitsMemberhttp://www.sec.gov/CIK0001405621instant2013-02-28T00:00:000001-01-01T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli01false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse1false truefalseI2014Q1_us-gaap_PartnerCapitalComponentsAxis_ck0001405621_ClassUnitsMemberhttp://www.sec.gov/CIK0001405621instant2013-05-31T00:00:000001-01-01T00:00:00falsefalseClass A Unitsus-gaap_PartnerCapitalComponentsAxisxbrldihttp://xbrl.org/2006/xbrldick0001405621_ClassUnitsMemberus-gaap_PartnerCapitalComponentsAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0nanafalse0Class A Units2false 4ck0001405621_LimitedLiabilityCompanyMembersUnitsIssuedck0001405621_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse11falsefalsefalse2truefalsefalse11falsefalsefalsexbrli:sharesItemTypesharesLimited Liability Company Members Units IssuedNo definition available.false1Member units, issued3false 4ck0001405621_LimitedLiabilityCompanyMembersUnitsOutstandingck0001405621_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse11falsefalsefalse2truefalsefalse11falsefalsefalsexbrli:sharesItemTypesharesLimited Liability Company Members Units OutstandingNo definition available.false1Member units, outstanding4false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false truefalseI2014Q1_us-gaap_PartnerCapitalComponentsAxis_ck0001405621_ClassBUnitsMemberhttp://www.sec.gov/CIK0001405621instant2013-05-31T00:00:000001-01-01T00:00:00falsefalseClass B Unitsus-gaap_PartnerCapitalComponentsAxisxbrldihttp://xbrl.org/2006/xbrldick0001405621_ClassBUnitsMemberus-gaap_PartnerCapitalComponentsAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0nanafalse0Class B Units5false 4ck0001405621_LimitedLiabilityCompanyMembersUnitsIssuedck0001405621_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse99999999falsefalsefalse2truefalsefalse99999999falsefalsefalsexbrli:sharesItemTypesharesLimited Liability Company Members Units IssuedNo definition available.false1Member units, issued6false 4ck0001405621_LimitedLiabilityCompanyMembersUnitsOutstandingck0001405621_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse99999999falsefalsefalse2truefalsefalse99999999falsefalsefalsexbrli:sharesItemTypesharesLimited Liability Company Members Units OutstandingNo definition available.false1Member units, outstandingfalseCONSOLIDATED BALANCE SHEETS (Parenthetical)UnKnownNoRoundingUnKnownUnKnowntruefalsefalseSheethttp://www.0001405621.com/role/ConsolidatedBalanceSheetsParenthetical26