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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 21, 2015
Mar. 22, 2014
Income Tax Contingency [Line Items]    
Beginning balance $ 0us-gaap_AccruedIncomeTaxes $ 0us-gaap_AccruedIncomeTaxes
Additions for current year tax positions 0esca_CurrentYearTaxAdditions 0esca_CurrentYearTaxAdditions
Additions for prior year tax positions 0us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes 0us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes
Settlements 0us-gaap_IncomeTaxReconciliationTaxSettlements 0us-gaap_IncomeTaxReconciliationTaxSettlements
Reductions or settlements 0us-gaap_IncomeTaxReconciliationDeductions 0us-gaap_IncomeTaxReconciliationDeductions
Reductions for prior year tax positions 0esca_ReductionsForPriorYearTaxPositions 0esca_ReductionsForPriorYearTaxPositions
Ending balance $ 0us-gaap_AccruedIncomeTaxes $ 0us-gaap_AccruedIncomeTaxes