Name:	eei_MinimumPercentageOfNumberOfOutstandingClassSharesToCombinedClassesOfShares
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The percentage of the class of share holders entitled to elect the board of directors on condition that that the number of the class of shares outstanding is at least ten percent of the combined total of both classes of shares.

No definition available.

Name:	eei_PercentageEquityHoldersEntitledToElectBoardOfDirectors
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The voting power of Class A common share holders to the Class B common share holders.

No definition available.

Name:	eei_VotingPowerOfClassCommonShareHoldersToClassBCommonShareHolders
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Data Type:	xbrli:pureItemType
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Period Type:	duration

Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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No definition available.

Name:	us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract
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Period Type:	duration

No definition available.

Name:	us-gaap_ClassOfStockDisclosuresAbstract
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Balance Type:	na
Period Type:	duration

The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Name:	us-gaap_ConversionOfStockSharesConverted1
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Period Type:	duration

No definition available.

Name:	us-gaap_DisclosureOfRepurchaseAgreementsAbstract
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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

Name:	us-gaap_Dividends
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Period Type:	duration

No definition available.

Name:	us-gaap_DividendsCashAbstract
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Data Type:	xbrli:stringItemType
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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

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Data Type:	xbrli:sharesItemType
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The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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Number of shares that have been repurchased during the period and are being held in treasury.

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