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Derivative Accounting - Derivative Instruments in the Balance Sheets (Details) - USD ($) | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Assets |  |
Gross Recognized Derivatives | $ 17,304,000 | $ 515,000
Liabilities |  |
Amount Reported on Balance Sheets | (13,358,000) | (72,132,000)
Commodity Contracts |  |
Assets |  |
Gross Recognized Derivatives | 20,513,000 |
Amounts Offset | (3,209,000) |
Net Recognized Derivatives | 17,304,000 |
Other | 0 | 405,000
Amount Reported on Balance Sheets | 17,304,000 |
Liabilities |  |
Gross Recognized Derivatives | (15,282,000) | (71,421,000)
Amounts Offset | 3,209,000 | 474,000
Net Recognized Derivatives | (12,073,000) | (70,947,000)
Other | (1,285,000) | (1,185,000)
Amount Reported on Balance Sheets | (13,358,000) | (72,132,000)
Assets and Liabilities |  |
Gross Recognized Derivatives | 5,231,000 | (70,837,000)
Amounts Offset | 0 | 0
Net Recognized Derivatives | 5,231,000 | (70,837,000)
Other | (1,285,000) | (780,000)
Amount Reported on Balance Sheets | 3,946,000 | (71,617,000)
Cash collateral received from counterparties | 1,285,000 | 1,185,000
Commodity Contracts | Current assets |  |
Assets |  |
Gross Recognized Derivatives | 15,505,000 | 584,000
Amounts Offset | (1,630,000) | (474,000)
Net Recognized Derivatives | 13,875,000 | 110,000
Other | 0 | 405,000
Amount Reported on Balance Sheets | 13,875,000 | 515,000
Commodity Contracts | Investments and other assets |  |
Assets |  |
Gross Recognized Derivatives | 5,008,000 |
Amounts Offset | (1,579,000) |
Net Recognized Derivatives | 3,429,000 |
Other | 0 |
Amount Reported on Balance Sheets | 3,429,000 |
Commodity Contracts | Current liabilities |  |
Liabilities |  |
Gross Recognized Derivatives | (4,611,000) | (38,235,000)
Amounts Offset | 1,630,000 | 474,000
Net Recognized Derivatives | (2,981,000) | (37,761,000)
Other | (1,285,000) | (1,185,000)
Amount Reported on Balance Sheets | (4,266,000) | (38,946,000)
Assets and Liabilities |  |
Cash collateral received from counterparties | 1,285,000 | 1,185,000
Commodity Contracts | Deferred credits and other |  |
Liabilities |  |
Gross Recognized Derivatives | (10,671,000) | (33,186,000)
Amounts Offset | 1,579,000 | 0
Net Recognized Derivatives | (9,092,000) | (33,186,000)
Other | 0 | 0
Amount Reported on Balance Sheets | (9,092,000) | (33,186,000)
Assets and Liabilities |  |
Cash collateral received from counterparties | $ 0 | $ 0

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