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Shareholders' equity
 12 Months Ended
Dec. 31, 2022
Equity [Abstract]  
Shareholders' equity Shareholders' equity
Our authorized capital is comprised of 200 million common shares, $1 par value, and 500,000 preference shares. No preference shares have been outstanding during the last three years.
Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share is computed in the same manner except that the weighted average number of shares is increased to include dilutive securities. The following table provides a reconciliation of basic to diluted weighted average shares outstanding:
 202220212020
Basic46,898 46,774 46,488 
Dilutive effect of share based awards411 653 799 
Diluted47,309 47,427 47,287 
Weighted average shares that were antidilutive and therefore excluded from the calculation of diluted earnings per share were 0.5 million for the year ended December 31, 2022, and 0.1 million for the years ended December 31, 2021 and 2020.
The following tables provides information relating to the changes in accumulated other comprehensive income (loss), net of tax, for each of the years ended December 31, 2022 and 2021:
 
Cash Flow
Hedges
Pension and
Other
Postretirement
Benefit Plans
Foreign
Currency
Translation
Adjustment
Accumulated
Other
Comprehensive
Income (Loss)
Balance at December 31, 2020$(482)$(150,257)$(146,559)$(297,298)
Other comprehensive income (loss) before reclassifications
351 6,192 (63,191)(56,648)
Amounts reclassified from accumulated other comprehensive income
1,212 5,775 — 6,987 
Net current-year other comprehensive income (loss)
1,563 11,967 (63,191)(49,661)
Balance at December 31, 20211,081 (138,290)(209,750)(346,959)
Other comprehensive income (loss) before reclassifications
7,179 (2,606)(62,904)(58,331)
Amounts reclassified from accumulated other comprehensive income
(3,329)5,097 — 1,768 
Net current-year other comprehensive income (loss)
3,850 2,491 (62,904)(56,563)
Balance at December 31, 2022$4,931 $(135,799)$(272,654)$(403,522)
The following table provides information relating to the (gains) losses recognized in the statements of income including the reclassifications of losses (gains) in accumulated other comprehensive (loss) income into expense/(income), net of tax, for the years ended December 31, 2022, 2021 and 2020:
Year Ended December 31,
202220212020
(Gains) losses on designated foreign exchange forward contracts:
Cost of goods sold$(3,532)$1,150 $2,354 
Total before tax(3,532)1,150 2,354 
Taxes expense (benefit)203 62 (240)
Net of tax$(3,329)$1,212 $2,114 
Amortization of pension and other postretirement benefits items:
Actuarial losses (1)
$7,660 $8,543 $7,253 
Prior-service credits (1)
(1,017)(1,012)33 
Total before tax6,643 7,531 7,286 
Tax benefit(1,546)(1,756)(1,701)
Net of tax$5,097 $5,775 $5,585 
Impact on income from continuing operations, net of tax$1,768 $6,987 $7,699 
(1)These accumulated other comprehensive (loss) income components are included in the computation of net benefit cost of pension and other postretirement benefit plans (see Note 16 for additional information).