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Accumulated other comprehensive loss
 3 Months Ended
Mar. 31, 2022
Equity [Abstract]  
Accumulated other comprehensive loss Accumulated other comprehensive loss
The following table summarizes the components of, and the changes in, Accumulated Other Comprehensive Loss (AOCL), net of tax (in thousands):
Retirement PlansForeign Currency TranslationAvailable-For-Sale InvestmentTotal
Quarters Ended:
Balance at Dec. 31, 2021$(113,090)$455 $15,419 $(97,216)
Other comprehensive income before reclassifications— 77 — 77 
Amounts reclassified from AOCL724 — (15,419)(14,695)
Total other comprehensive income (loss)724 77 (15,419)(14,618)
Balance at Mar. 31, 2022$(112,366)$532 $— $(111,834)
Balance at Dec. 31, 2020$(120,979)$(97)$— $(121,076)
Other comprehensive loss before reclassifications— 369 — 369 
Amounts reclassified from AOCL909 — — 909 
Total other comprehensive income909 369 — 1,278 
Balance at Mar. 31, 2021$(120,070)$272 $— $(119,798)

Reclassifications from AOCL to the Consolidated Statements of Income are comprised of recognition of a realized gain on an available-for-sale investment as well as pension and other post-retirement components. Pension and other post retirement reclassifications are related to the amortizations of prior service costs and actuarial losses. Amounts reclassified out of AOCL are summarized below (in thousands):
Quarter ended Mar. 31,
20222021
Amortization of prior service (credit) cost, net$(125)$25 
Amortization of actuarial loss1,100 1,200 
Realized gain on available-for-sale investment(20,800)— 
Total reclassifications, before tax(19,825)1,225 
Income tax effect5,130 (316)
Total reclassifications, net of tax$(14,695)$909