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Other comprehensive income
 3 Months Ended
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 componentsAmounts reclassified from accumulated other comprehensive lossAffected line item in consolidated statements of comprehensive income
Quarter Ended
March 31,
(in thousands)20232022
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 adjustmentAccumulated 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.