XML 93 R82.htm IDEA: XBRL DOCUMENT v3.20.2

Earnings (Loss) Per Share (Details Textual) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Common Class B [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Deferred stock units	$ 0.6

X

- Definition

Value of deferred stock issued during the period upon the conversion of units.

+ References

No definition available.

+ Details

Name:	gne_DeferredStockOfUnits
Namespace Prefix:	gne_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_EarningsPerShareBasicLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: