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Accumulated other comprehensive income (loss) | 6 Months Ended
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Jun. 30, 2019
Equity [Abstract] |
Comprehensive income (loss) | Accumulated other comprehensive income (loss) The after-tax changes in the components of accumulated other comprehensive income (loss) were as follows:
Six Months Ended June 30, 2019 | 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, 2018 | $ | (2,161 | ) | $ | (36,069 | ) | $ | (112 | ) | $ | (38,342 | )
Other comprehensive income before reclassifications | — |  | — |  | 39 |  | 39 |
Amounts reclassified from accumulated other comprehensive loss | 397 |  | 310 |  | 28 |  | 735 |
Net current-period other comprehensive income | 397 |  | 310 |  | 67 |  | 774 |
At March 31, 2019 | $ | (1,764 | ) | $ | (35,759 | ) | $ | (45 | ) | $ | (37,568 | )
Other comprehensive income before reclassifications | — |  | — |  | 79 |  | 79 |
Amounts reclassified from accumulated other comprehensive loss | 111 |  | 276 |  | 12 |  | 399 |
Net current-period other comprehensive income | 111 |  | 276 |  | 91 |  | 478 |
At June 30, 2019 | $ | (1,653 | ) | $ | (35,483 | ) | $ | 46 |  | $ | (37,090 | )
Six Months Ended June 30, 2018 | Net Unrealized Gain (Loss) on Derivative Instruments Qualifying as Hedges |  | Postretirement Liability Adjustment |  | Foreign Currency Translation Adjustment |  | Net Unrealized Gain (Loss) on Available-for-sale Investments |  | Total Accumulated Other Comprehensive Loss |
| (In thousands)
At December 31, 2017 | $ | (1,934 | ) | $ | (35,163 | ) | $ | (155 | ) | $ | (82 | ) | $ | (37,334 | )
Other comprehensive loss before reclassifications | — |  | — |  | (2 | ) | (105 | ) | (107 | )
Amounts reclassified from accumulated other comprehensive loss | 92 |  | 418 |  | — |  | 30 |  | 540 |
Net current-period other comprehensive income (loss) | 92 |  | 418 |  | (2 | ) | (75 | ) | 433 |
Reclassification adjustment of prior period tax effects related to TCJA included in accumulated other comprehensive loss | (389 | ) | (7,520 | ) | (33 | ) | (17 | ) | (7,959 | )
At March 31, 2018 | $ | (2,231 | ) | $ | (42,265 | ) | $ | (190 | ) | $ | (174 | ) | $ | (44,860 | )
Other comprehensive loss before reclassifications | — |  | — |  | (59 | ) | (43 | ) | (102 | )
Amounts reclassified from accumulated other comprehensive loss | 95 |  | 449 |  | 249 |  | 34 |  | 827 |
Net current-period other comprehensive income (loss) | 95 |  | 449 |  | 190 |  | (9 | ) | 725 |
At June 30, 2018 | $ | (2,136 | ) | $ | (41,816 | ) | $ | — |  | $ | (183 | ) | $ | (44,135 | )
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 | Six Months Ended | Location on Consolidated Statements of Income
| June 30, | June 30,
| 2019 | 2018 | 2019 | 2018
| (In thousands) |
Reclassification adjustment for loss on derivative instruments included in net income | $ | (147 | ) | $ | (148 | ) | $ | (295 | ) | $ | (296 | ) | Interest expense
| 36 |  | 53 |  | (213 | ) | 109 |  | Income taxes
| (111 | ) | (95 | ) | (508 | ) | (187 | ) |
Amortization of postretirement liability losses included in net periodic benefit cost (credit) | (365 | ) | (594 | ) | (775 | ) | (1,167 | ) | Other income
| 89 |  | 145 |  | 189 |  | 300 |  | Income taxes
| (276 | ) | (449 | ) | (586 | ) | (867 | ) |
Reclassification adjustment for loss on foreign currency translation adjustment included in net income | — |  | (324 | ) | — |  | (324 | ) | Other income
| — |  | 75 |  | — |  | 75 |  | Income taxes
| — |  | (249 | ) | — |  | (249 | ) |
Reclassification adjustment on available-for-sale investments included in net income | (15 | ) | (44 | ) | (50 | ) | (81 | ) | Other income
| 3 |  | 10 |  | 10 |  | 17 |  | Income taxes
| (12 | ) | (34 | ) | (40 | ) | (64 | ) |
Total reclassifications | $ | (399 | ) | $ | (827 | ) | $ | (1,134 | ) | $ | (1,367 | ) |

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