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Other comprehensive income (loss) | 6 Months Ended
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Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Other comprehensive income (loss) | Reclassification adjustments – Information regarding amounts reclassified from accumulated other comprehensive loss to net income (loss) was as follows:
Accumulated other comprehensive loss components |  | Amounts reclassified from accumulated other comprehensive loss |  | Affected line item in consolidated statements of comprehensive income (loss)
|  | Quarter Ended June 30, |  | Six Months Ended June 30, |  |
(in thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020 |  |
Realized loss on interest rate swap |  | $ | (330) |  |  | $ | (281) |  |  | $ | (664) |  |  | $ | (188) |  |  | Interest expense
Tax benefit |  | 87 |  |  | 73 |  |  | 174 |  |  | 49 |  |  | Income tax provision
Realized loss on interest rate swap, net of tax |  | (243) |  |  | (208) |  |  | (490) |  |  | (139) |  |  | Net income (loss)
Amortization of postretirement benefit plan items: |  |  |  |  |  |  |  |  |  |
Prior service credit |  | 355 |  |  | 355 |  |  | 711 |  |  | 711 |  |  | Other income
Net actuarial loss |  | (407) |  |  | (575) |  |  | (814) |  |  | (1,150) |  |  | Other income
Total amortization |  | (52) |  |  | (220) |  |  | (103) |  |  | (439) |  |  | Other income
Tax (expense) benefit |  | (31) |  |  | 12 |  |  | (63) |  |  | 23 |  |  | Income tax provision
Amortization of postretirement benefit plan items, net of tax |  | (83) |  |  | (208) |  |  | (166) |  |  | (416) |  |  | Net income (loss)
Total reclassifications, net of tax |  | $ | (326) |  |  | $ | (416) |  |  | $ | (656) |  |  | $ | (555) |  |  |
Accumulated other comprehensive loss – Changes in the components of accumulated other comprehensive loss during the six months ended June 30, 2021 were as follows:
(in thousands) |  | Postretirement benefit plans |  | Net unrealized loss on available-for-sale debt securities(1) |  | Net unrealized loss on cash flow hedge(2) |  | Currency translation adjustment |  | Accumulated other comprehensive loss
Balance, December 31, 2020 |  | $ | (21,956) |  |  | $ | (90) |  |  | $ | (5,351) |  |  | $ | (14,036) |  |  | $ | (41,433) |
Other comprehensive (loss) income before reclassifications |  | — |  |  | (189) |  |  | 799 |  |  | 2,338 |  |  | 2,948 |
Amounts reclassified from accumulated other comprehensive loss |  | 166 |  |  | — |  |  | 490 |  |  | — |  |  | 656 |
Net current-period other comprehensive income (loss) |  | 166 |  |  | (189) |  |  | 1,289 |  |  | 2,338 |  |  | 3,604 |
Balance, June 30, 2021 |  | $ | (21,790) |  |  | $ | (279) |  |  | $ | (4,062) |  |  | $ | (11,698) |  |  | $ | (37,829) |
(1) Other comprehensive loss before reclassifications is net of an income tax benefit of $66. (2) Other comprehensive income before reclassifications is net of income tax expense of $283.

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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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