XML 16 R55.htm IDEA: XBRL DOCUMENT v3.3.0.814

Segment Reporting - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) customer supplier	Sep. 30, 2014 USD ($) customer supplier	Sep. 30, 2015 USD ($) customer supplier	Sep. 30, 2014 USD ($) customer supplier
Segment Reporting [Abstract]
Asset optimization revenue | $	$ 27.7	$ 45.9	$ 120.7	$ 225.4
Asset optimization cost of revenues | $	$ 28.2	$ 46.0	$ 119.4	$ 223.7
Customer | Sales Revenue
Segment Reporting Information [Line Items]
Number of significant customers	1	4	1	1
Customer | Retail Natural Gas | Sales Revenue
Segment Reporting Information [Line Items]
Number of significant customers	0	0	0	0
Customer | Retail Electricity | Sales Revenue
Segment Reporting Information [Line Items]
Number of significant customers	0	0	0	0
Supplier | Cost of Revenues
Segment Reporting Information [Line Items]
Number of significant suppliers | supplier	0	0	0	0
Supplier | Retail Natural Gas | Cost of Revenues
Segment Reporting Information [Line Items]
Number of significant suppliers | supplier	1	2	1	1
Supplier | Retail Electricity | Cost of Revenues
Segment Reporting Information [Line Items]
Number of significant suppliers | supplier	5	1	4	1

X

- Definition

Asset Optimization, Cost of Revenues

+ References

No definition available.

+ Details

Name:	spke_AssetOptimizationCostofRevenues
Namespace Prefix:	spke_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Asset Optimization Revenue, Gross

+ References

No definition available.

+ Details

Name:	spke_AssetOptimizationRevenueGross
Namespace Prefix:	spke_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Number of Significant Customers

+ References

No definition available.

+ Details

Name:	spke_NumberofSignificantCustomers
Namespace Prefix:	spke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of Significant Suppliers

+ References

No definition available.

+ Details

Name:	spke_NumberofSignificantSuppliers
Namespace Prefix:	spke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=spke_RetailNaturalGasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=spke_RetailElectricityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_SupplierConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_CostOfGoodsTotalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: