CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Retail revenues	$ 177,805	$ 231,488	$ 417,959	$ 515,489
Net asset optimization (expense) revenues	(56)	763	2,496	3,450
Total Revenues	177,749	232,251	420,455	518,939
Operating Expenses:
Retail cost of revenues	158,759	162,669	354,014	452,545
General and administrative	37,247	27,780	66,723	57,827
Depreciation and amortization	10,312	12,861	22,467	25,880
Total Operating Expenses	206,318	203,310	443,204	536,252
Operating (loss) income	(28,569)	28,941	(22,749)	(17,313)
Other (expense)/income:
Interest expense	(1,995)	(2,316)	(4,218)	(4,561)
Interest and other income	494	553	683	754
Total other expenses	(1,501)	(1,763)	(3,535)	(3,807)
(Loss) income before income tax (benefit) expense	(30,070)	27,178	(26,284)	(21,120)
Income tax (benefit) expense	(4,586)	3,251	(3,545)	(3,216)
Net (loss) income	(25,484)	23,927	(22,739)	(17,904)
Less: Net (loss) income attributable to non-controlling interests	(18,369)	15,142	(16,406)	(15,584)
Net (loss) income attributable to Spark Energy, Inc. stockholders	(7,115)	8,785	(6,333)	(2,320)
Less: Dividend on Series A Preferred Stock	2,027	2,027	4,054	4,054
Net (loss) income attributable to stockholders of Class A common stock	(9,142)	6,758	(10,387)	(6,374)
Other comprehensive (loss) income, net of tax:
Currency translation (loss) gain	(63)	25	(98)	(58)
Other comprehensive (loss) income	(63)	25	(98)	(58)
Comprehensive (loss) income	(25,547)	23,952	(22,837)	(17,962)
Less: Comprehensive (loss) income attributable to non-controlling interests	(18,407)	15,157	(16,464)	(15,620)
Comprehensive (loss) income attributable to Spark Energy, Inc. stockholders	$ (7,140)	$ 8,795	$ (6,373)	$ (2,342)
Net (loss) income attributable to Spark Energy, Inc. per share of Class A common stock
Basic (in dollars per share)	$ (0.64)	$ 0.51	$ (0.73)	$ (0.48)
Diluted (in dollars per share)	$ (0.73)	$ 0.51	$ (0.73)	$ (0.52)
Weighted average shares of Class A common stock outstanding
Basic (in shares)	14,246	13,229	14,191	13,183
Diluted (in shares)	35,046	13,246	34,991	34,668