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Other comprehensive income | 3 Months Ended
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Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Other comprehensive income | Reclassification adjustments – Information regarding amounts reclassified from accumulated other comprehensive loss to net income was as follows:
Accumulated other comprehensive loss components |  | Amounts reclassified from accumulated other comprehensive loss |  | Affected line item in consolidated statements of comprehensive income
|  | Quarter Ended March 31, |  |  |  |
(in thousands) |  | 2023 |  | 2022 |  |  |  |  |  |
Amortization of postretirement benefit plan items: |  |  |  |  |  |  |  |  |  |
Prior service credit |  | $ | 355 |  |  | $ | 355 |  |  |  |  |  |  | Other income
Net actuarial loss |  | (568) |  |  | (225) |  |  |  |  |  |  | Other income
Total amortization |  | (213) |  |  | 130 |  |  |  |  |  |  | Other income
Tax benefit (expense) |  | 16 |  |  | (77) |  |  |  |  |  |  | Income tax provision
Amortization of postretirement benefit plan items, net of tax |  | (197) |  |  | 53 |  |  |  |  |  |  | Net income
Realized gain (loss) on cash flow hedges |  | 570 |  |  | (318) |  |  |  |  |  |  | Interest expense
Tax (expense) benefit |  | (152) |  |  | 83 |  |  |  |  |  |  | Income tax provision
Realized gain (loss) on cash flow hedges, net of tax |  | 418 |  |  | (235) |  |  |  |  |  |  | Net income
Total reclassifications, net of tax |  | $ | 221 |  |  | $ | (182) |  |  |  |  |  |  |
Accumulated other comprehensive loss – Changes in the components of accumulated other comprehensive loss during the quarter ended March 31, 2023 were as follows:
(in thousands) |  | Postretirement benefit plans |  | Net unrealized loss on debt securities(1) |  | Net unrealized gain (loss) on cash flow hedges(2) |  | Currency translation adjustment |  | Accumulated other comprehensive loss
Balance, December 31, 2022 |  | $ | (26,872) |  |  | $ | (909) |  |  | $ | 2,593 |  |  | $ | (12,076) |  |  | $ | (37,264) |
Other comprehensive income (loss) before reclassifications |  | — |  |  | 123 |  |  | (2,872) |  |  | 227 |  |  | (2,522) |
Amounts reclassified from accumulated other comprehensive loss |  | 197 |  |  | — |  |  | (418) |  |  | — |  |  | (221) |
Net current-period other comprehensive income (loss) |  | 197 |  |  | 123 |  |  | (3,290) |  |  | 227 |  |  | (2,743) |
Balance, March 31, 2023 |  | $ | (26,675) |  |  | $ | (786) |  |  | $ | (697) |  |  | $ | (11,849) |  |  | $ | (40,007) |
(1) Other comprehensive income before reclassifications is net of income tax expense of $43. (2) Other comprehensive loss before reclassifications is net of an income tax benefit of $1,045.

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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 https://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 https://asc.fasb.org/extlink&oid=126953954&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 https://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 https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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