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Segment Reporting (Tables)
3 Months Ended
Mar. 31, 2022
Segment Reporting [Abstract]  
Schedule of Reconciliation of Retail Gross Margin to Income Before Income Tax Expense Below is a reconciliation of retail gross margin to income before income tax expense (in thousands):
  
Three Months Ended March 31,
  20222021
Reconciliation of Retail Gross Margin to income before taxes
Income (loss) before income tax expense $37,069 $(29,095)
Interest and other income(48)(86)
Interest expense1,307 1,311 
Operating income 38,328 (27,870)
Depreciation and amortization5,184 6,036 
General and administrative14,935 12,671 
Less:
Net asset optimization expense(904)(140)
Net, gain on non-trading derivative instruments43,916 7,054 
Net, Cash settlements on non-trading derivative instruments(13,320)(1,189)
Non-recurring event - Winter Storm Uri— (64,900)
Retail Gross Margin$28,755 $50,012 
Schedule of Financial Data for Business Segments
Financial data for business segments are as follows (in thousands):
Three Months Ended March 31, 2022
Retail
Electricity (a)
Retail
Natural Gas
Corporate
and Other
EliminationsConsolidated
Total Revenues$88,041 $40,017 $(904)$— $127,154 
Retail cost of revenues46,160 22,547 — — 68,707 
Less:
Net asset optimization expense— (904)— (904)
Net, gain on non-trading derivative instruments36,239 7,677 — — 43,916 
Current period settlements on non-trading derivatives(11,544)(1,776)— — (13,320)
Retail Gross Margin$17,186 $11,569 $ $ $28,755 
Total Assets at March 31, 2022$1,613,559 $33,773 $317,615 $(1,612,199)$352,748 
Goodwill at March 31, 2022$117,813 $2,530 $ $ $120,343 
(a) Retail Electricity includes related services.

Three Months Ended March 31, 2021
Retail
Electricity
Retail
Natural Gas
Corporate
and Other
EliminationsConsolidated
Total revenues$78,755 $34,390 $(140)$— $113,005 
Retail cost of revenues107,524 14,644 — — 122,168 
Less:
Net asset optimization expense— — (140)— (140)
Net, gain on non-trading derivative instruments6,705 349 — — 7,054 
Current period settlements on non-trading derivatives(1,188)(1)— — (1,189)
Non-recurring event - Winter Storm Uri(64,900)   (64,900)
Retail Gross Margin$30,614 $19,398 $ $ $50,012 
Total Assets at December 31, 2021$1,527,456 $7,320 $311,556 $(1,491,056)$355,276 
Goodwill at December 31, 2021$117,813 $2,530 $ $ $120,343