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Other Liabilities Other long-term liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Tax Credit Carryforward [Line Items]      
Reversal of valuation allowance, foreign taxes $ 45sxcl_ValuationAllowanceDeferredTaxAssetChangeinAmountForeignTaxesExpirationofStatuteofLimitations $ 7,298sxcl_ValuationAllowanceDeferredTaxAssetChangeinAmountForeignTaxesExpirationofStatuteofLimitations $ 0sxcl_ValuationAllowanceDeferredTaxAssetChangeinAmountForeignTaxesExpirationofStatuteofLimitations
Foreign Tax Authority      
Tax Credit Carryforward [Line Items]      
Reversal of valuation allowance, foreign taxes   $ 7,200sxcl_ValuationAllowanceDeferredTaxAssetChangeinAmountForeignTaxesExpirationofStatuteofLimitations
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember