Shareholders' equity (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Schedule of Weighted Average Number of Shares

The following table provides a reconciliation of basic to diluted weighted average shares outstanding:

	2015	2014	2013
	(Shares in thousands)
Basic	41,558	41,366	41,105
Dilutive effect of share based awards	488	450	410
Dilutive effect of 3.875% Convertible Notes and warrants	6,012	4,654	2,178
Diluted	48,058	46,470	43,693

Schedule of 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 years ended December 31, 2015 and 2014:

	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, 2013	$	—		$	(97,037	)	$	(13,818	)	$	(110,855	)
Other comprehensive income (loss) before reclassifications	594			(47,536		)	(105,333		)	(152,275		)
Amounts reclassified from accumulated other comprehensive income (loss)	(594		)	2,829			—			2,235
Net current-year other comprehensive income (loss)	—			(44,707		)	(105,333		)	(150,040		)
Balance at December 31, 2014	—			(141,744		)	(119,151		)	(260,895		)
Other comprehensive income (loss) before reclassifications	(2,974		)	(1,276		)	(110,595		)	(114,845		)
Amounts reclassified from accumulated other comprehensive income	483			4,133			—			4,616
Net current-year other comprehensive (loss) income	(2,491		)	2,857			(110,595		)	(110,229		)
Balance at December 31, 2015	$	(2,491	)	$	(138,887	)	$	(229,746	)	$	(371,124	)

Reclassification out of Accumulated Other Comprehensive Income

The following table provides information relating to the reclassifications of losses/(gains) in accumulated other comprehensive (loss) income into expense/(income), net of tax, for the years ended December 31, 2015, 2014 and 2013 :

	December 31, 2015			December 31, 2014			December 31, 2013
	(Dollars in thousands)
Losses (gains) on foreign exchange contracts:
Cost of goods sold	$	679		$	(705	)	$	884
Total before tax	679			(705		)	884
Taxes	(196		)	111			46
Net of tax	$	483		$	(594	)	$	930
Amortization of pension and other postretirement benefits items:
Actuarial losses (1)	$	6,375		$	4,385		$	7,211
Prior-service credits (1)	—			(21		)	(21		)
Transition obligation	—			—			5
Total before tax	6,375			4,364			7,195
Tax benefit	(2,242		)	(1,535		)	(2,439		)
Net of tax	$	4,133		$	2,829		$	4,756
Total reclassifications, net of tax	$	4,616		$	2,235		$	5,686

(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 14 to the consolidated financial statements for additional information).