Fair Value Measurements (Tables)
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12 Months Ended |
Dec. 31, 2019 |
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| Fair Value Disclosures [Abstract] |
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| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis |
The following tables set forth, by level within the fair value hierarchy, our gross assets and gross liabilities and related offsetting as permitted by GAAP that were accounted for at fair value on a recurring basis for derivative instruments (in thousands): | | | | | | | | | | | | | | | | | | | As of December 31, 2019 | | Level 1 | Level 2 | Level 3 | | Cash Collateral and Counterparty Netting | Total | Assets: | | | | | | | Commodity derivatives - Utilities | $ | — |
| $ | 1,433 |
| $ | — |
| | $ | (1,085 | ) | $ | 348 |
| Total | $ | — |
| $ | 1,433 |
| $ | — |
| | $ | (1,085 | ) | $ | 348 |
| | | | | | | | Liabilities: | | | | | | | Commodity derivatives - Utilities | $ | — |
| $ | 5,254 |
| $ | — |
| | $ | (2,909 | ) | $ | 2,345 |
| Total | $ | — |
| $ | 5,254 |
| $ | — |
| | $ | (2,909 | ) | $ | 2,345 |
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| | | | | | | | | | | | | | | | | | | As of December 31, 2018 | | Level 1 | Level 2 | Level 3 | | Cash Collateral and Counterparty Netting | Total | Assets: | | | | | | | Commodity derivatives - Utilities | $ | — |
| 2,927 |
| $ | — |
| | $ | (1,408 | ) | $ | 1,519 |
| Total | $ | — |
| $ | 2,927 |
| $ | — |
| | $ | (1,408 | ) | $ | 1,519 |
| | | | | | | | Liabilities: | | | | | | | Commodity derivatives - Utilities | $ | — |
| $ | 6,801 |
| $ | — |
| | $ | (5,794 | ) | $ | 1,007 |
| Total | $ | — |
| $ | 6,801 |
| $ | — |
| | $ | (5,794 | ) | $ | 1,007 |
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| Schedule of Derivative Instruments in Statement of Financial Position, Fair Value |
The following tables present the fair value and balance sheet classification of our derivative instruments as of December 31, (in thousands): | | | | | | | | | | | December 31, | | Balance Sheet Location | 2019 | 2018 | Derivatives designated as hedges: | | | | Asset derivative instruments: | | | | Current commodity derivatives | Derivative assets - current | $ | 1 |
| $ | 415 |
| Noncurrent commodity derivatives | Other assets, non-current | 3 |
| 18 |
| Liability derivative instruments: | | | | Current commodity derivatives | Derivative liabilities - current | (490 | ) | (114 | ) | Noncurrent commodity derivatives | Other deferred credits and other liabilities | (29 | ) | (4 | ) | Total derivatives designated as hedges | $ | (515 | ) | $ | 315 |
| | | | | Not designated as hedges: | | | | Asset derivative instruments: | | | | Current commodity derivatives | Derivative assets - current | $ | 341 |
| $ | 1,085 |
| Noncurrent commodity derivatives | Other assets, non-current | 2 |
| 1 |
| Liability derivative instruments: | | | | Current commodity derivatives | Derivative liabilities - current | (1,764 | ) | (833 | ) | Noncurrent commodity derivatives | Other deferred credits and other liabilities | (63 | ) | (56 | ) | Total derivatives not designated as hedges | $ | (1,484 | ) | $ | 197 |
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| Schedule of Derivative Offsetting on Balance Sheet |
Offsetting of derivative assets and derivative liabilities on our Consolidated Balance Sheets at December 31, 2019 was as follows (in thousands): | | | | | | | | | | | Derivative Assets | Gross Amounts of Derivative Assets | Gross Amounts Offset on Consolidated Balance Sheets | Net Amount of Total Derivative Assets on Consolidated Balance Sheets | Commodity derivative assets subject to a master netting agreement or similar arrangement | $ | 1,085 |
| $ | (1,085 | ) | $ | — |
| Commodity derivative assets not subject to a master netting agreement or similar arrangement | 348 |
| — |
| 348 |
| Total derivative assets | $ | 1,433 |
| $ | (1,085 | ) | $ | 348 |
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| | | | | | | | | | | Derivative Liabilities | Gross Amounts of Derivative Liabilities | Gross Amounts Offset on Consolidated Balance Sheets | Net Amount of Total Derivative Liabilities on Consolidated Balance Sheets | Commodity derivative liabilities subject to a master netting agreement or similar arrangement | $ | 2,908 |
| $ | (2,908 | ) | $ | — |
| Commodity derivative liabilities not subject to a master netting agreement or similar arrangement | 2,345 |
| — |
| 2,345 |
| Total derivative liabilities | $ | 5,253 |
| $ | (2,908 | ) | $ | 2,345 |
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Offsetting of derivative assets and derivative liabilities on our Consolidated Balance Sheets as of December 31, 2018 were as follows (in thousands): | | | | | | | | | | | Derivative Assets | Gross Amounts of Derivative Assets | Gross Amounts Offset on Consolidated Balance Sheets | Net Amount of Total Derivative Assets on Consolidated Balance Sheets | Commodity derivative assets subject to a master netting agreement or similar arrangement | $ | 1,408 |
| $ | (1,408 | ) | $ | — |
| Commodity derivative assets not subject to a master netting agreement or similar arrangement | 1,519 |
| — |
| 1,519 |
| Total derivative assets | $ | 2,927 |
| $ | (1,408 | ) | $ | 1,519 |
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| | | | | | | | | | | Derivative Liabilities | Gross Amounts of Derivative Liabilities | Gross Amounts Offset on Consolidated Balance Sheets | Net Amount of Total Derivative Liabilities on Consolidated Balance Sheets | Commodity derivative liabilities subject to a master netting agreement or similar arrangement | $ | 5,794 |
| $ | (5,794 | ) | $ | — |
| Commodity derivative liabilities not subject to a master netting agreement or similar arrangement | 1,007 |
| — |
| 1,007 |
| Total derivative liabilities | $ | 6,801 |
| $ | (5,794 | ) | $ | 1,007 |
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