Guarantor Financial Information (Condensed Consolidating Statements of Comprehensive Income) (Loss) (Details) (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
Issuer [Member]
Net income/ (loss)	15,954	27,651	(477)	86,474
Other comprehensive income, net of tax:
Foreign currency translation	0		0
Pension adjustments	321	806	962	2,416
Total other comprehensive income/ (loss), net of tax	1,092	1,180	632	4,036
Total comprehensive income/ (loss)	17,046	28,831	155	90,510
Guarantors [Member]
Net income/ (loss)	1,071	22,628	86,371	79,990
Other comprehensive income, net of tax:
Foreign currency translation	0		0
Pension adjustments	0	0	0	0
Total other comprehensive income/ (loss), net of tax	0	0	0	0
Total comprehensive income/ (loss)	1,071	22,628	86,371	79,990
Non-guarantors [Member]
Net income/ (loss)	9,145	7,311	(7,106)	5,434
Other comprehensive income, net of tax:
Foreign currency translation	(71,231)		(57,547)
Pension adjustments	0	0	0	0
Total other comprehensive income/ (loss), net of tax	(71,231)	0	(57,547)	0
Total comprehensive income/ (loss)	(62,086)	7,311	(64,653)	5,434
Eliminations [Member]
Net income/ (loss)	(10,216)	(29,939)	(79,265)	(85,424)
Other comprehensive income, net of tax:
Foreign currency translation	0		0
Pension adjustments	0	0	0	0
Total other comprehensive income/ (loss), net of tax	0	0	0	0
Total comprehensive income/ (loss)	(10,216)	(29,939)	(79,265)	(85,424)
Natural Gas Swap [Member]
Other comprehensive income, net of tax:
Derivative adjustments	(40)	49	(164)	(12)
Natural Gas Swap [Member] | Issuer [Member]
Other comprehensive income, net of tax:
Derivative adjustments	(40)	49	(164)	(12)
Natural Gas Swap [Member] | Guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0	0	0	0
Natural Gas Swap [Member] | Non-guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0	0	0	0
Natural Gas Swap [Member] | Eliminations [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0	0	0	0
Corn Option [Member]
Other comprehensive income, net of tax:
Derivative adjustments	811	325	(166)	1,632
Corn Option [Member] | Issuer [Member]
Other comprehensive income, net of tax:
Derivative adjustments	811	325	(166)	1,632
Corn Option [Member] | Guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0	0	0	0
Corn Option [Member] | Non-guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0	0	0	0
Corn Option [Member] | Eliminations [Member]
Other comprehensive income, net of tax:
Derivative adjustments	$ 0	$ 0	$ 0	$ 0