XML 78 R63.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Retirement and Other Benefit Plans (Schedule Of Asset Allocation For Pension Plans Acceptable Range And Target Allocation By Asset Category) (Details) | Sep. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2017
--- | --- | --- | ---
Cash and Cash Equivalents [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 2.00% | 3.00%
Cash and Cash Equivalents [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 5.00% |  |
Cash and Cash Equivalents [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 0.00% |  |
Cash and Cash Equivalents [Member] | Target Allocation 2019 [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 8211.00% |  |
Return seeking [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 44.00% | 62.00%
Return seeking [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 47.00% |  |
Return seeking [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 39.00% |  |
Return seeking [Member] | Target Allocation 2019 [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 37.00% |  |
Hedge Funds, Equity [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage |  | 54.00% | 35.00%
Hedge Funds, Equity [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 61.00% |  |
Hedge Funds, Equity [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 53.00% |  |
Hedge Funds, Equity [Member] | Target Allocation 2019 [Member] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 63.00% |  |

X
- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=ese_TargetAllocation2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ese_ReturnSeekingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |