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Long-Term Debt (Textual 2 ABL Facilities) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended 2 Months Ended
Apr. 04, 2015
Mar. 29, 2014
Dec. 28, 2013
Jun. 05, 2015
Oct. 12, 2010
Line of Credit Facility [Line Items]          
Debt Instrument, Interest Rate Margin Pricing Increments 25 basis point        
Fixed charge coverage ratio   0.52:1.00      
Line of credit          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity         $ 225.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
Line of credit facility, increase (decrease) in borrowing capacity, net     12.0side_LineofCreditFacilityIncreaseDecreaseInBorrowingCapacityNet
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
   
Write off of deferred debt issuance cost     0.5us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
   
Line of credit facility, unused capacity, commitment fee percentage 0.375%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
       
Debt instrument, covenant minimum availability as percentage of borrowing base 10.00%side_DebtInstrumentCovenantMinimumAvailabilityAsPercentageOfBorrowingBase
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
       
Debt Instrument, Covenant Minimum Availability 20.0side_DebtInstrumentCovenantMinimumAvailability
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
       
Line of credit facility, excess availability 19.7side_Lineofcreditfacilityexcessavailability
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
       
Line of credit facility, remaining borrowing capacity 34.7us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
       
Letters of Credit Outstanding, Amount 12.3us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
       
US facility          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity         150.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
Line of credit facility, interest rate at period end 2.50%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
       
Canadian facility          
Line of Credit Facility [Line Items]          
Line of credit facility, maximum borrowing capacity         75.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_ForeignLineOfCreditMember
Line of credit facility, interest rate at period end 4.20%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ us-gaap_CreditFacilityAxis
= us-gaap_ForeignLineOfCreditMember
       
LIBOR | US facility          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis LIBOR        
Debt instrument, basis spread on variable rate 2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
/ side_RevolvingCreditFacilityInterestRateOptionsAxis
= side_LiborMember
       
CDOR | US facility          
Line of Credit Facility [Line Items]          
Debt instrument, basis spread on variable rate 2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
/ side_RevolvingCreditFacilityInterestRateOptionsAxis
= side_CdorMember
       
CDOR | Canadian facility          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis CDOR        
One-month LIBOR | US facility          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis one-month LIBOR        
Debt instrument, basis spread on variable rate 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
/ side_RevolvingCreditFacilityInterestRateOptionsAxis
= side_OneMonthLiborMember
       
Debt instrument, additional basis rate 1.00%side_DebtInstrumentAdditionalBasisRate
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
/ side_RevolvingCreditFacilityInterestRateOptionsAxis
= side_OneMonthLiborMember
       
30 Day CDOR | Canadian facility          
Line of Credit Facility [Line Items]          
Debt instrument, additional basis rate 1.00%side_DebtInstrumentAdditionalBasisRate
/ us-gaap_CreditFacilityAxis
= us-gaap_ForeignLineOfCreditMember
/ side_RevolvingCreditFacilityInterestRateOptionsAxis
= side_ThirtyDayCdorMember
       
US prime rate | US facility          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis prime rate        
Canadian primate rate | Canadian facility          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis Canadian prime        
Federal Funds Effective Rate | US facility          
Line of Credit Facility [Line Items]          
Debt instrument, description of variable rate basis Federal Funds Effective Rate        
Debt instrument, additional basis rate 0.50%side_DebtInstrumentAdditionalBasisRate
/ us-gaap_CreditFacilityAxis
= us-gaap_DomesticLineOfCreditMember
/ side_RevolvingCreditFacilityInterestRateOptionsAxis
= side_FederalFundsEffectiveRateMember
       
Subsequent Event [Member] | Line of credit          
Line of Credit Facility [Line Items]          
Debt Instrument, Covenant Minimum Availability       $ 15.0side_DebtInstrumentCovenantMinimumAvailability
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember