Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Net income/ (loss)	$ 15,954	$ 27,651	$ (477)	$ 86,474
Other comprehensive income, net of tax:
Foreign currency translation	(71,231)	0	(57,547)	0
Pension adjustments	321	806	962	2,416
Total other comprehensive income/ (loss), net of tax	(70,139)	1,180	(56,915)	4,036
Total comprehensive income/ (loss)	(54,185)	28,831	(57,392)	90,510
Natural Gas Swap [Member]
Other comprehensive income, net of tax:
Derivative adjustments	(40)	49	(164)	(12)
Corn Option [Member]
Other comprehensive income, net of tax:
Derivative adjustments	$ 811	$ 325	$ (166)	$ 1,632