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Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Ownership Interests Percentage

Subsequent to the IPO through December 31, 2016, the Company and NuDevco owned the following economic interests in Spark HoldCo:

	The Company	NuDevco Retail and Retailco (1)
From the IPO to December 31, 2014	21.82%	78.18%
On December 31, 2015	22.49%	77.51%
On December 31, 2016	38.85%	61.15%
(1) In January 2016, Retailco succeeded to the interest of NuDevco Retail Holdings of its Class B common stock and in equal number of Spark HoldCo units it held pursuant to a series of transfers.

The Company and NuDevco Retail and Retailco owned the following economic interests in Spark HoldCo at December 31, 2015 and December 31, 2016, respectively.

Non-controlling Interest Economic Interest
	The Company		NuDevco Retail and Retailco (1)
December 31, 2015	22.49	%	77.51	%
December 31, 2016	38.85	%	61.15	%
(1) In January 2016, Retailco succeeded to the interest of NuDevco Retail Holdings of its Class B common stock and in equal number of Spark HoldCo units it held pursuant to a series of transfers.

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Tabular disclosure of sales of stock or previously unissued stock made by subsidiary or equity method investee to investors outside the consolidated group. This includes stock issued in a business combination in exchange for shares of an acquired entity.

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