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Nature of Operations and Summary of Significant Accounting Policies (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Nature Of Operations and Summary Of Significant Accounting Policies [Line Items]
Income from non-marketable equity investments accounted for on the equity method	$ 3,923us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	$ 2,934us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	$ 2,998us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
Royalty income from patents	0us-gaap_RoyaltyIncomeNonoperating	0us-gaap_RoyaltyIncomeNonoperating	30us-gaap_RoyaltyIncomeNonoperating
Proceeds from insurance for involuntary conversion	603esca_GainLossFromInsuranceProceedsForInvoluntaryConversion	0esca_GainLossFromInsuranceProceedsForInvoluntaryConversion	0esca_GainLossFromInsuranceProceedsForInvoluntaryConversion
Rent income from real estate	106us-gaap_ProfitLossFromRealEstateOperations	0us-gaap_ProfitLossFromRealEstateOperations	0us-gaap_ProfitLossFromRealEstateOperations
Other	94us-gaap_NoninterestIncomeOther	0us-gaap_NoninterestIncomeOther	0us-gaap_NoninterestIncomeOther
Other Income	$ 4,726us-gaap_OtherIncome	$ 2,934us-gaap_OtherIncome	$ 3,028us-gaap_OtherIncome

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- Definition

Amount of gain (loss) from insurance proceeds for involuntary conversion.

+ References

No definition available.

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The amount of net income (loss) reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

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Represents the total of noninterest income derived from certain activities and assets including (for example): (1) venture capital investments; (2) bank owned life insurance; (3) foreign currency transactions; and (4) mortgage servicing rights.

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Reflects the sum of all other revenue and income recognized by the entity in the period not otherwise specified in the income statement.

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The net cost of operation of other real estate (including provisions for real estate losses, rental income, and gains and losses on sales of real estate).

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Ancillary revenue earned during the period from the consideration paid to the entity for the use of its rights and property by another party. Examples include licensing the use of copyrighted materials and leasing the extraction of natural resources.

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