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CONSOLIDATED BALANCE SHEETS (Parenthetical)
Nov. 30, 2014
Feb. 28, 2014
Class A Units    
Member units, issued 1ck0001405621_LimitedLiabilityCompanyMembersUnitsIssued
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassUnitsMember		 1ck0001405621_LimitedLiabilityCompanyMembersUnitsIssued
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassUnitsMember
Member units, outstanding 1ck0001405621_LimitedLiabilityCompanyMembersUnitsOutstanding
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassUnitsMember		 1ck0001405621_LimitedLiabilityCompanyMembersUnitsOutstanding
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassUnitsMember
Class B Units    
Member units, issued 9,999ck0001405621_LimitedLiabilityCompanyMembersUnitsIssued
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassBUnitsMember		 9,999ck0001405621_LimitedLiabilityCompanyMembersUnitsIssued
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassBUnitsMember
Member units, outstanding 9,999ck0001405621_LimitedLiabilityCompanyMembersUnitsOutstanding
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassBUnitsMember		 9,999ck0001405621_LimitedLiabilityCompanyMembersUnitsOutstanding
/ us-gaap_PartnerCapitalComponentsAxis
= ck0001405621_ClassBUnitsMember