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Indebtedness - ABL Credit Facility (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 3 Months Ended 0 Months Ended
Mar. 23, 2015
Apr. 03, 2015
Mar. 18, 2011
Mar. 21, 2014
Mar. 25, 2013
Line of Credit Facility [Line Items]          
Subsidiary ownership percentage   100.00%emax_SubsidiaryOwnershipPercentage      
Minimum consolidated adjusted 2015 EBITDA $ 52.0emax_MinimumConsolidatedAdjusted2015EBITDA        
ABL Credit Facility | London Interbank Offered Rate (LIBOR)          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis   LIBOR      
ABL Credit Facility | Base Rate          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis   Base Rate      
ABL Credit Facility | Prime Rate          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis   prime rate      
ABL Credit Facility | Federal Funds          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis   federal funds      
Line of credit | ABL Credit Facility          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity     70us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
   
Line of credit facility, remaining borrowing capacity   10.2us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
     
Debt, weighted average interest rate   2.254%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
     
Foreign restricted subsidiaries, percent of voting capital stock, collateral     65.00%emax_ForeignRestrictedSubsidiariesPercentOfVotingCapitalStockCollateral
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
   
Foreign restricted subsidiaries, percent of non-voting capital stock, collateral     100.00%emax_ForeignRetrictedSubsidiariesPercentOfNonVotingCapitalStockCollateral
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
   
Amended excess availability threshold percenatge that triggers a minimum consolidated fixed charge coverage ratio   12.50%emax_AmendedExcessAvailabilityThresholdPercenatgeThatTriggersMinimumConsolidatedFixedChargeCoverageRatio
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
    12.50%emax_AmendedExcessAvailabilityThresholdPercenatgeThatTriggersMinimumConsolidatedFixedChargeCoverageRatio
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
Line of credit | ABL Credit Facility | Minimum          
Line of Credit Facility [Line Items]          
Line of credit facility, unused capacity, commitment fee percentage     0.375%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Line of credit | ABL Credit Facility | Maximum          
Line of Credit Facility [Line Items]          
Line of credit facility, unused capacity, commitment fee percentage     0.50%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Line of credit | ABL Credit Facility | London Interbank Offered Rate (LIBOR)          
Line of Credit Facility [Line Items]          
Debt instrument, basis spread on variable rate       1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
 
Line of credit | ABL Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum          
Line of Credit Facility [Line Items]          
Debt instrument, basis spread on variable rate       1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
 
Line of credit | ABL Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum          
Line of Credit Facility [Line Items]          
Debt instrument, basis spread on variable rate       2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
 
Line of credit | ABL Credit Facility | Base Rate | Minimum          
Line of Credit Facility [Line Items]          
Debt instrument, basis spread on variable rate       1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember
 
Line of credit | ABL Credit Facility | Base Rate | Maximum          
Line of Credit Facility [Line Items]          
Debt instrument, basis spread on variable rate       1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember
 
Line of credit | ABL Credit Facility | Federal Funds          
Line of Credit Facility [Line Items]          
Debt instrument, basis spread on variable rate       0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= emax_AblCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_FederalFundsPurchasedMember
 
Line of credit | Seasonal Overadvance A          
Line of Credit Facility [Line Items]          
Line of credit facility additional borrowing capacity seasonal overadvance A       15.0emax_LineOfCreditFacilityAdditionalBorrowingCapacitySeasonalOveradvanceA
/ us-gaap_DebtInstrumentAxis
= emax_SeasonalOveradvanceAMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Line of credit | Seasonal Overadvance A | Minimum          
Line of Credit Facility [Line Items]          
Debt convenant, required fixed charge coverage ratio 1.00emax_DebtConvenantRequiredFixedChargeCoverageRatio
/ us-gaap_DebtInstrumentAxis
= emax_SeasonalOveradvanceAMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Line of credit | Seasonal Overadvance B          
Line of Credit Facility [Line Items]          
Line of credit facility additional borrowing capacity seasonal overadvance B       9.0emax_LineOfCreditFacilityAdditionalBorrowingCapacitySeasonalOveradvanceB
/ us-gaap_DebtInstrumentAxis
= emax_SeasonalOveradvanceBMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Line of credit | Seasonal Overadvance C          
Line of Credit Facility [Line Items]          
Line of credit facility additional borrowing capacity seasonal overadvance C       6.0emax_LineOfCreditFacilityAdditionalBorrowingCapacitySeasonalOveradvanceC
/ us-gaap_DebtInstrumentAxis
= emax_SeasonalOveradvanceCMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Line of credit | Alternate Seasonal Overadvance Type B          
Line of Credit Facility [Line Items]          
Seasonal overadvance fee 0.20%emax_SeasonalOveradvanceFee
/ us-gaap_DebtInstrumentAxis
= emax_AlternateSeasonalOveradvanceTypeBMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Line of credit | Alternate Seasonal Overadvance Type B | Minimum          
Line of Credit Facility [Line Items]          
Debt convenant, required fixed charge coverage ratio 0.85emax_DebtConvenantRequiredFixedChargeCoverageRatio
/ us-gaap_DebtInstrumentAxis
= emax_AlternateSeasonalOveradvanceTypeBMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Line of credit | Alternate Seasonal Overadvance Type B | Maximum          
Line of Credit Facility [Line Items]          
Debt convenant, required fixed charge coverage ratio 1.00emax_DebtConvenantRequiredFixedChargeCoverageRatio
/ us-gaap_DebtInstrumentAxis
= emax_AlternateSeasonalOveradvanceTypeBMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember