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Other comprehensive income (loss)
 3 Months Ended
Mar. 31, 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 componentsAmounts reclassified from accumulated other comprehensive lossAffected line item in consolidated statements of comprehensive income (loss)
Quarter Ended
March 31,
(in thousands)20212020
Realized (loss) gain on interest rate swap
$(334)$93 Interest expense
Tax benefit (expense)
87 (24)Income tax (provision) benefit
Realized (loss) gain on interest rate swap, net of tax
(247)69 Net income (loss)
Amortization of postretirement benefit plan items:
Prior service credit355 355 Other income
Net actuarial loss(407)(575)Other income
Total amortization(52)(220)Other income
Tax (expense) benefit(31)12 Income tax (provision) benefit
Amortization of postretirement benefit plan items, net of tax(83)(208)Net income (loss)
Total reclassifications, net of tax$(330)$(139)

Accumulated other comprehensive loss – Changes in the components of accumulated other comprehensive loss during the quarter ended March 31, 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 adjustmentAccumulated other comprehensive loss
Balance, December 31, 2020$(21,956)$(90)$(5,351)$(14,036)$(41,433)
Other comprehensive (loss) income before reclassifications
— (204)477 1,006 1,279 
Amounts reclassified from accumulated other comprehensive loss
83 — 247 — 330 
Net current-period other comprehensive income (loss)
83 (204)724 1,006 1,609 
Balance, March 31, 2021
$(21,873)$(294)$(4,627)$(13,030)$(39,824)

(1) Other comprehensive loss before reclassifications is net of an income tax benefit of $71.

(2) Other comprehensive income before reclassifications is net of income tax expense of $168.