Changes in shareholders' equity (Tables)

6 Months Ended

Jun. 26, 2016

Equity [Abstract]

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		Six Months Ended
	June 26, 2016	June 28, 2015	June 26, 2016	June 28, 2015
	(Shares in thousands)
Basic	43,549	41,560	42,598	41,514
Dilutive effect of share-based awards	566	473	543	470
Dilutive effect of 3.875% Convertible Notes and warrants	3,131	6,048	4,873	5,704
Diluted	47,246	48,081	48,014	47,688

Change in Accumulated Other Comprehensive Income (Loss)

The following tables provide information relating to the changes in accumulated other comprehensive loss, net of tax, for the six months ended June 26, 2016 and June 28, 2015:

	Cash Flow Hedges			Pension and Other Postretirement Benefit Plans			Foreign Currency Translation Adjustment			Accumulated Other Comprehensive (Loss) Income
	(Dollars in thousands)
Balance as of December 31, 2015	$	(2,491	)	$	(138,887	)	$	(229,746	)	$	(371,124	)
Other comprehensive income (loss) before reclassifications	(1,684		)	375			11,285			9,976
Amounts reclassified from accumulated other comprehensive income	2,668			2,109			—			4,777
Net current-period other comprehensive income	984			2,484			11,285			14,753
Balance as of June 26, 2016	$	(1,507	)	$	(136,403	)	$	(218,461	)	$	(356,371	)

	Cash Flow Hedges			Pension and Other Postretirement Benefit Plans			Foreign Currency Translation Adjustment			Accumulated Other Comprehensive (Loss) Income
	(Dollars in thousands)
Balance at December 31, 2014	$	—		$	(141,744	)	$	(119,151	)	$	(260,895	)
Other comprehensive (loss) before reclassifications	(922		)	300			(61,893		)	(62,515		)
Amounts reclassified from accumulated other comprehensive loss	163			2,137			—			2,300
Net current-period other comprehensive (loss) income	(759		)	2,437			(61,893		)	(60,215		)
Balance at June 28, 2015	$	(759	)	$	(139,307	)	$	(181,044	)	$	(321,110	)

Reclassification of Gain/Losses into Income/Expense, Net of Tax

The following table provides information relating to the location in the statements of operations and amount of reclassifications of losses/(gains) in accumulated other comprehensive (loss) income into expense/(income), net of tax, for the three and six months ended June 26, 2016 and June 28, 2015:

	Three Months Ended						Six Months Ended
	June 26, 2016			June 28, 2015			June 26, 2016			June 28, 2015
	(Dollars in thousands)
Losses on foreign exchange contracts:
Cost of goods sold	$	1,501		$	472		$	3,372		$	263
Total before tax	1,501			472			3,372			263
Tax (benefit) expense	(363		)	(110		)	(704		)	(100		)
Net of tax	$	1,138		$	362		$	2,668		$	163
Amortization of pension and other postretirement benefit items:
Actuarial losses (1)	$	1,620		$	1,605		$	3,242		$	3,211
Prior-service costs(1)	14			—			28			—
Total before tax	1,634			1,605			3,270			3,211
Tax (benefit) expense	(581		)	(564		)	(1,161		)	(1,074		)
Net of tax	$	1,053		$	1,041		$	2,109		$	2,137
Total reclassifications, net of tax	$	2,191		$	1,403		$	4,777		$	2,300

(1) These accumulated other comprehensive (loss) income components are included in the computation of net benefit expense for pension and other postretirement benefit plans (see Note 11 for additional information).