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Acquisitions Contech (Details) (Contech [Member], USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Jan. 31, 2015
Business Acquisition [Line Items]  
Business Combinations, Recognized Identifiable Assets Acquired And Liabilities Assumed, Cash In Escrow $ 438shlo_BusinessCombinationsRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashInEscrow
Business Combination, Amounts Due for Delinquent Tax Filings 307shlo_BusinessCombinationAmountsDueforDelinquentTaxFilings
Contech Sellers [Member]  
Business Acquisition [Line Items]  
Escrow Deposit Disbursements, Funds Returned to Company $ 131shlo_EscrowDepositDisbursementsFundsReturnedtoCompany
/ us-gaap_BusinessAcquisitionAxis
= shlo_ContechMember
/ us-gaap_CounterpartyNameAxis
= shlo_ContechSellersMember