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Accumulated other comprehensive loss | 9 Months Ended
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Sep. 30, 2023
Equity [Abstract] |
Accumulated other comprehensive loss | Accumulated other comprehensive loss The after-tax changes in the components of accumulated other comprehensive loss were as follows:
| Net Unrealized Gain (Loss) on Derivative Instruments Qualifying as Hedges | Postretirement Liability Adjustment |  | Net Unrealized Gain (Loss) on Available-for-sale Investments | Total Accumulated Other Comprehensive Loss
| (In thousands)
At December 31, 2022 | $ | (125) |  | $ | (29,900) |  |  | $ | (558) |  | $ | (30,583) |
Other comprehensive income before reclassifications | — |  | — |  |  | 70 |  | 70 |
Amounts reclassified from accumulated other comprehensive loss | 34 |  | 100 |  |  | 13 |  | 147 |
Net current-period other comprehensive income | 34 |  | 100 |  |  | 83 |  | 217 |
At March 31, 2023 | $ | (91) |  | $ | (29,800) |  |  | $ | (475) |  | $ | (30,366) |
Other comprehensive income before reclassifications | — |  | — |  |  | (84) |  | (84) |
Amounts reclassified from accumulated other comprehensive loss | 47 |  | 387 |  |  | 13 |  | 447 |
Net current-period other comprehensive income (loss) | 47 |  | 387 |  |  | (71) |  | 363 |
Amounts reclassified related to the separation of Knife River | 44 |  | 12,262 |  |  | — |  | 12,306 |
At June 30, 2023 | $ | — |  | $ | (17,151) |  |  | $ | (546) |  | $ | (17,697) |
Other comprehensive loss before reclassifications | — |  | — |  |  | (66) |  | (66) |
Amounts reclassified from accumulated other comprehensive loss | — |  | (6) |  |  | 10 |  | 4 |
Net current-period other comprehensive income (loss) | — |  | (6) |  |  | (56) |  | (62) |
At September 30, 2023 | $ | — |  | $ | (17,157) |  |  | $ | (602) |  | $ | (17,759) |
| Net Unrealized Gain (Loss) on Derivative Instruments Qualifying as Hedges | Postretirement Liability Adjustment |  | Net Unrealized Gain (Loss) on Available-for-sale Investments | Total Accumulated Other Comprehensive Loss
| (In thousands)
At December 31, 2021 | $ | (538) |  | $ | (40,461) |  |  | $ | (5) |  | $ | (41,004) |
Other comprehensive loss before reclassifications | — |  | — |  |  | (320) |  | (320) |
Amounts reclassified from accumulated other comprehensive loss | 112 |  | 445 |  |  | 32 |  | 589 |
Net current-period other comprehensive income (loss) | 112 |  | 445 |  |  | (288) |  | 269 |
At March 31, 2022 | $ | (426) |  | $ | (40,016) |  |  | $ | (293) |  | $ | (40,735) |
Other comprehensive loss before reclassifications | — |  | — |  |  | (128) |  | (128) |
Amounts reclassified to accumulated other comprehensive loss from a regulatory asset | — |  | (3,265) |  |  | — |  | (3,265) |
Amounts reclassified from accumulated other comprehensive loss | 111 |  | 461 |  |  | 25 |  | 597 |
Net current-period other comprehensive income (loss) | 111 |  | (2,804) |  |  | (103) |  | (2,796) |
At June 30, 2022 | $ | (315) |  | $ | (42,820) |  |  | $ | (396) |  | $ | (43,531) |
Other comprehensive loss before reclassifications | — |  | — |  |  | (329) |  | (329) |
Amounts reclassified from accumulated other comprehensive loss | 111 |  | 461 |  |  | 42 |  | 614 |
Net current-period other comprehensive income (loss) | 111 |  | 461 |  |  | (287) |  | 285 |
At September 30, 2022 | $ | (204) |  | $ | (42,359) |  |  | $ | (683) |  | $ | (43,246) |
The following amounts were reclassified out of accumulated other comprehensive loss into net income. The amounts presented in parenthesis indicate a decrease to net income on the Consolidated Statements of Income. The reclassifications were as follows:
| Three Months Ended | Nine Months Ended |  | Location on Consolidated Statements of Income
| September 30, | September 30, |
| 2023 | 2022 | 2023 | 2022 |  |
| (In thousands) |
Reclassification adjustment for loss on derivative instruments included in net income | $ | — |  | $ | (148) |  | $ | (98) |  | $ | (443) |  |  |  | Interest expense
| — |  | 37 |  | 17 |  | 109 |  |  |  | Income taxes
| — |  | (111) |  | (81) |  | (334) |  |  |  |
Amortization of postretirement liability losses included in net periodic benefit credit | (92) |  | (609) |  | (744) |  | (1,827) |  |  |  | Other income
| 98 |  | 148 |  | 263 |  | 460 |  |  |  | Income taxes
| 6 |  | (461) |  | (481) |  | (1,367) |  |  |  |
Reclassification adjustment on available-for-sale investments included in net income | (13) |  | (54) |  | (45) |  | (126) |  |  |  | Other income
| 3 |  | 12 |  | 9 |  | 27 |  |  |  | Income taxes
| (10) |  | (42) |  | (36) |  | (99) |  |  |  |
Total reclassifications | $ | (4) |  | $ | (614) |  | $ | (598) |  | $ | (1,800) |  |  |  |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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