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Changes in shareholders' equity (Tables) | 3 Months Ended
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Mar. 31, 2013
Reconciliation of Basic to Diluted Weighted Average Common Shares Outstanding | The following table provides a reconciliation of basic to diluted weighted average shares outstanding:
|  | Three Months Ended |
|  | March 31, 2013 |  |  | April 1, 2012 |
|  | (Shares in thousands) |
Basic |  |  | 41,014 |  |  |  | 40,769 |
Dilutive shares assumed issued |  |  | 2,033 |  |  |  | — |
Diluted |  |  | 43,047 |  |  |  | 40,769 |
Change in Accumulated Other Comprehensive Income (Loss) | The following tables provide information relating to the changes in accumulated other comprehensive income (loss), net of tax, for the three months ended March 31, 2013 and April 1, 2012:
|  | Cash Flow Hedges |  |  | Pension and Other Postretirement Benefit Plans |  |  | Foreign Currency Translation Adjustment |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (Dollars in thousands) |
Balance at December 31, 2012 |  | $ | (381 | ) |  | $ | (127,257 | ) |  | $ | (4,410 | ) |  | $ | (132,048 | )
Other comprehensive income (loss) before reclassifications |  |  | 455 |  |  |  | (365 | ) |  |  | (26,746 | ) |  |  | (26,656 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | (275 | ) |  |  | 1,455 |  |  |  | — |  |  |  | 1,180 |
Net current-period other comprehensive income (loss) |  |  | 180 |  |  |  | 1,090 |  |  |  | (26,746 | ) |  |  | (25,476 | )
Balance at March 31, 2013 |  | $ | (201 | ) |  | $ | (126,167 | ) |  | $ | (31,156 | ) |  | $ | (157,524 | )
|  | Cash Flow Hedges |  |  | Pension and Other Postretirement Benefit Plans |  |  | Foreign Currency Translation Adjustment |  |  | Accumulated Other Comprehensive Income (Loss) |
|  | (Dollars in thousands) |
Balance at December 31, 2011 |  | $ | (7,257 | ) |  | $ | (134,548 | ) |  | $ | (17,548 | ) |  | $ | (159,353 | )
Other comprehensive income (loss) before reclassifications |  |  | 693 |  |  |  | (139 | ) |  |  | 30,605 |  |  |  | 31,159 |
Amounts reclassified from accumulated other comprehensive income |  |  | 1,767 |  |  |  | 1,117 |  |  |  | — |  |  |  | 2,884 |
Net current-period other comprehensive income |  |  | 2,460 |  |  |  | 978 |  |  |  | 30,605 |  |  |  | 34,043 |
Balance at April 1, 2012 |  | $ | (4,797 | ) |  | $ | (133,570 | ) |  | $ | 13,057 |  |  | $ | (125,310 | )
Reclassification of Gain/Losses into Income/Expense, Net of Tax | The following table provides information relating to the reclassifications of losses/(gain) in accumulated other comprehensive income into expense/(income), net of tax, for the three months ended March 31, 2013 and April 1, 2012:
|  | March 31, 2013 |  |  | April 1, 2012 |
|  | (Dollars in thousands) |
Gains and losses on cash flow hedges: |  |  |  |  |  |  |  |
Interest Rate Contracts: |  |  |  |  |  |  |  |
Interest expense |  | $ | — |  |  | $ | 3,751 |
Foreign Exchange Contracts: |  |  |  |  |  |  |  |
Cost of goods sold |  |  | (502 | ) |  |  | (897 | )
Total before tax |  |  | (502 | ) |  |  | 2,854 |
Tax expense |  |  | 227 |  |  |  | (1,087 | )
Net of tax |  | $ | (275 | ) |  | $ | 1,767 |
Amortization of pension and other postretirement benefits items: |  |  |  |  |  |  |  |
Actuarial losses/(gains)(1) |  | $ | 2,146 |  |  | $ | 1,711 |
Prior-service costs(1) |  |  | (6 | ) |  |  | (6 | )
Transition obligation(1) |  |  | 1 |  |  |  | 24 |
Total before tax |  |  | 2,141 |  |  |  | 1,729 |
Tax expense |  |  | (687 | ) |  |  | (612 | )
Net of tax |  | $ | 1,455 |  |  | $ | 1,117 |
Total reclassifications, net of tax |  | $ | 1,180 |  |  | $ | 2,884 |
(1) | These accumulated other comprehensive income components are included in the computation of net benefit cost of pension and other postretirement benefit plans (see Note 12, “Pension and other postretirement benefits” for additional information).

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