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Derivative Financial Instruments (Schedule Of Interest Rate Swaps Classified) (Details) (USD $) In Millions | Sep. 30, 2011
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Derivative [Line Items] |
Contingent consideration | $ 4.8
Level 1 [Member] |
Derivative [Line Items] |
Contingent consideration |
Level 1 [Member] | Interest Rate Swap [Member] |
Derivative [Line Items] |
Interest rate swaps, Liabilities |
Level 2 [Member] |
Derivative [Line Items] |
Contingent consideration |
Level 2 [Member] | Interest Rate Swap [Member] |
Derivative [Line Items] |
Interest rate swaps, Liabilities |
Level 3 [Member] |
Derivative [Line Items] |
Contingent consideration | 4.8
Level 3 [Member] | Interest Rate Swap [Member] |
Derivative [Line Items] |
Interest rate swaps, Liabilities |
Interest Rate Swap [Member] |
Derivative [Line Items] |
Interest rate swaps, Liabilities |

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- Definition Contingent consideration liabilities. + Details
Name: | ese_ContingentConsiderationLiabilities
Namespace Prefix: | ese
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611 + Details
Name: | us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant