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Accumulated other comprehensive income (loss) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Comprehensive income (loss) | Accumulated Other Comprehensive Income (Loss) The Company's accumulated other comprehensive income (loss) is comprised of losses on derivative instruments qualifying as hedges, postretirement liability adjustments and gain (loss) on available-for-sale investments. The after-tax changes in the components of accumulated other comprehensive loss at December 31, 2020, 2019 and 2018, were as follows:
| Net Unrealized Loss on Derivative Instruments Qualifying as Hedges | Post- retirement Liability Adjustment | Net Unrealized Gain (Loss) on Available- for-sale Investments | Total Accumulated Other Comprehensive Loss
| (In thousands)
At December 31, 2018 | $ | (2,161) |  | $ | (36,069) |  | $ | (112) |  | $ | (38,342) |
Other comprehensive income (loss) before reclassifications | — |  | (6,151) |  | 134 |  | (6,017) |
Amounts reclassified from accumulated other comprehensive loss | 731 |  | 1,486 |  | 40 |  | 2,257 |
Net current-period other comprehensive income (loss) | 731 |  | (4,665) |  | 174 |  | (3,760) |
At December 31, 2019 | (1,430) |  | (40,734) |  | 62 |  | (42,102) |
Other comprehensive loss before reclassifications | — |  | (8,395) |  | (1) |  | (8,396) |
Amounts reclassified from accumulated other comprehensive loss | 446 |  | 1,922 |  | 52 |  | 2,420 |
Net current-period other comprehensive income (loss) | 446 |  | (6,473) |  | 51 |  | (5,976) |
At December 31, 2020 | $ | (984) |  | $ | (47,207) |  | $ | 113 |  | $ | (48,078) |
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 for the years ended December 31 were as follows:
| 2020 | 2019 | Location on Consolidated Statements of Income
| (In thousands) |
Reclassification adjustment for loss on derivative instruments included in net income | $ | (591) |  | $ | (591) |  | Interest expense
| 145 |  | (140) |  | Income taxes
| (446) |  | (731) |  |
Amortization of postretirement liability losses included in net periodic benefit cost | (2,552) |  | (1,962) |  | Other income
| 630 |  | 476 |  | Income taxes
| (1,922) |  | (1,486) |  |
Reclassification adjustment for loss on available-for-sale investments included in net income | (66) |  | (50) |  | Other income
| 14 |  | 10 |  | Income taxes
| (52) |  | (40) |  |
Total reclassifications | $ | (2,420) |  | $ | (2,257) |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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