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Derivative and Hedging Instruments (Tables) | 12 Months Ended
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Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Gross Notional Volume of Open Derivatives | The gross notional volume of open derivatives is as follows:
|  | December 31, 2013 |  | December 31, 2012 |
| Commodity derivative contracts | 458,660 MWh |  | 444,650 MWh |
| Commodity derivative contracts | 3,750,000 Dth |  | 1,980,000 Dth |
| FTRs | 1,984 MW |  | 2,670 MW |
Fair Value of Derivative Instruments on the Balance Sheet |
| Asset Derivatives |  | Liability Derivatives
(In thousands) | Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value
December 31, 2013 |  |  |  |  |  |  |
Commodity derivative contracts | Other current assets | $ | 1,356 | Derivative liability (current) | $ | 51
Commodity derivative contracts | Other deferred charges |  | 167 |  | Derivative liability (long-term) |  | 48
FTRs | Other current assets |  | 363 |  | Derivative liability (current) |  | 0
Ten-year PPA | N/A |  | N/A |  | Derivative liability (current) |  | 7,750
Ten-year PPA | N/A |  | N/A |  | Derivative liability (long-term) |  | 57,930
December 31, 2012 |  |  |  |  |  |  |
Commodity derivative contracts | Other current assets | $ | 365 |  | Derivative liability (current) | $ | 394
Commodity derivative contracts | Other deferred charges |  | 95 |  | Derivative liability (long-term) |  | 11
FTRs | Other current assets |  | 206 |  | Derivative liability (current) |  | 0
Ten-year PPA | N/A |  | N/A |  | Derivative liability (current) |  | 9,270
Ten-year PPA | N/A |  | N/A |  | Derivative liability (long-term) |  | 63,320
Offsetting Assets | The following tables show the effect of netting arrangements for recognized derivative assets and liabilities that are subject to a master netting arrangement or similar arrangement on the balance sheet.
| Offsetting of Derivative Assets |
|  |  |  |  | Gross amounts |  | Collateral |  | Net amount |
|  |  |  |  | offset in |  | posted against |  | presented in |
| (In thousands) |  | Gross amounts |  | balance sheet |  | derivative positions |  | balance sheet |
| December 31, 2013 |  |  |  |  |  |  |  |  |
| Commodity derivative contracts | $ | 1,523 | $ | (99) | $ | (175) | $ | 1,249 |
| FTRs |  | 363 |  | - |  | - |  | 363 |
| December 31, 2012 |  |  |  |  |  |  |  |  |
| Commodity derivative contracts | $ | 460 | $ | (405) | $ | - | $ | 55 |
| FTRs |  | 206 |  | - |  | - |  | 206 |
Offsetting Liabilities |
| Offsetting of Derivative Liabilities |
|  |  |  |  | Gross amounts |  | Collateral |  | Net amount |
|  |  |  |  | offset in |  | posted against |  | presented in |
| (In thousands) |  | Gross amounts |  | balance sheet |  | derivative positions |  | balance sheet |
| December 31, 2013 |  |  |  |  |  |  |  |  |
| Commodity derivative contracts | $ | 99 | $ | (99) | $ | - | $ | - |
| Ten-year PPA |  | 65,680 |  | - |  | - |  | 65,680 |
| December 31, 2012 |  |  |  |  |  |  |  |  |
| Commodity derivative contracts | $ | 405 | $ | (405) | $ | - | $ | - |
| Ten-year PPA |  | 72,590 |  | - |  | - |  | 72,590 |
Derivative Gains and Losses in Balance Sheet | The following tables summarize the unrealized and realized gains (losses) related to the derivative instruments on the consolidated balance sheet at December 31, 2013 and 2012, and the consolidated income statement for the year ended December 31, 2013 and 2012.
|  | 2013 |  |  | 2012
(In thousands) |  | Current and Long-Term Regulatory Asset |  | Other Current Assets |  |  | Current and Long-Term Regulatory Asset |  | Other Current Assets
Year Ended December 31: |  |  |  |  |  |  |  |  |
Balance at January 1, | $ | 72,329 | $ | 574 |  | $ | 42,356 | $ | 1,604
Change in unrealized loss |  | (5,069) |  | 0 |  |  | 37,822 |  | 0
Realized loss reclassified to a deferred account |  | (823) |  | 823 |  |  | (2,857) |  | 2,857
Realized loss reclassified to income statement |  | (2,544) |  | (986) |  |  | (4,992) |  | (3,887)
Balance at December 31, | $ | 63,893 | $ | 411 |  | $ | 72,329 | $ | 574
Derivative Gains and Losses in Income Statement |
|  |  | Realized losses (gains) |
|  |  | Fuel for Electric |  |  |
|  |  | Generation/ |  | Cost of |
| (In thousands) |  | Purchased Power |  | Gas Sold |
| Year Ended December 31, 2013: |  |  |  |  |
| Commodity derivative contracts | $ | (564) | $ | 868 |
| FTRs |  | (983) |  | 0 |
| Ten-year PPA |  | 4,209 |  | 0 |
| Year Ended December 31, 2012: |  |  |  |  |
| Commodity derivative contracts | $ | 2,620 | $ | 3,072 |
| FTRs |  | (45) |  | 0 |
| Ten-year PPA |  | 3,232 |  | 0 |

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