XML 42 R30.htm IDEA: XBRL DOCUMENT
v3.21.1

Other Comprehensive Income (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Statement of Comprehensive Income [Abstract] |
Reclassification Out of Accumulated Other Comprehensive Income (Loss) | The following table details reclassifications out of AOCI and into Net income. The amounts in parentheses below indicate decreases to Net income in the Condensed Consolidated Statements of Income for the period (in thousands):
| Location on the Condensed Consolidated Statements of Income |  |  |  | Amount Reclassified from AOCI
|  | Three Months Ended March 31,
|  |  | 2021 | 2020
Gains and (losses) on cash flow hedges: |  |  |  |  |  |
Interest rate swaps | Interest expense |  |  |  | $ | (713) |  | $ | (713) |
Commodity contracts | Fuel, purchased power and cost of natural gas sold |  |  |  | (31) |  | (486) |
|  |  |  |  | (744) |  | (1,199) |
Income tax | Income tax benefit |  |  |  | 198 |  | 285 |
Total reclassification adjustments related to cash flow hedges, net of tax |  |  |  |  | $ | (546) |  | $ | (914) |
Amortization of components of defined benefit plans: |  |  |  |  |  |
Prior service cost | Operations and maintenance |  |  |  | $ | 25 |  | $ | 30 |
Actuarial gain (loss) | Operations and maintenance |  |  |  | (598) |  | (597) |
|  |  |  |  | (573) |  | (567) |
Income tax | Income tax benefit |  |  |  | 208 |  | 88 |
Total reclassification adjustments related to defined benefit plans, net of tax |  |  |  |  | $ | (365) |  | $ | (479) |
Total reclassifications |  |  |  |  | $ | (911) |  | $ | (1,393) |
Schedule of Accumulated Other Comprehensive Income (Loss) | Balances by classification included within AOCI, net of tax on the accompanying Condensed Consolidated Balance Sheets were as follows (in thousands):
| Derivatives Designated as Cash Flow Hedges |  |
| Interest Rate Swaps | Commodity Derivatives | Employee Benefit Plans | Total
As of December 31, 2020 | $ | (12,558) |  | $ | 2 |  | $ | (14,790) |  | $ | (27,346) |
Other comprehensive income (loss) |  |  |  |
before reclassifications | — |  | 107 |  | — |  | 107 |
Amounts reclassified from AOCI | 523 |  | 23 |  | 365 |  | 911 |
As of March 31, 2021 | $ | (12,035) |  | $ | 132 |  | $ | (14,425) |  | $ | (26,328) |
| Derivatives Designated as Cash Flow Hedges |  |
| Interest Rate Swaps | Commodity Derivatives | Employee Benefit Plans | Total
As of December 31, 2019 | $ | (15,122) |  | $ | (456) |  | $ | (15,077) |  | $ | (30,655) |
Other comprehensive income (loss) |  |  |  |
before reclassifications | — |  | (175) |  | 55 |  | (120) |
Amounts reclassified from AOCI | 543 |  | 371 |  | 479 |  | 1,393 |
As of March 31, 2020 | $ | (14,579) |  | $ | (260) |  | $ | (14,543) |  | $ | (29,382) |

X
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration