Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended											12 Months Ended
	Dec. 28, 2013		Sep. 28, 2013		Jun. 29, 2013		Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Net income	$ 22,493	[1]	$ 27,651	[1]	$ 26,418	[1]	$ 32,405	$ 28,802	$ 37,172	$ 36,225	$ 28,571	$ 108,967	$ 130,770	$ 169,418
Other comprehensive income (Loss), net of tax:
Foreign currency translation												(14,502)	0	0
Pension adjustments												15,140	(1,169)	(10,146)
Total other comprehensive income (loss), net of tax												1,906	(425)	(9,916)
Total comprehensive Income												110,873	130,345	159,502
Natural Gas Swap [Member]
Other comprehensive income (Loss), net of tax:
Derivative adjustments												127	391	(482)
Corn Option [Member]
Other comprehensive income (Loss), net of tax:
Derivative adjustments												1,141	194	0
Interest Rate Swap [Member]
Other comprehensive income (Loss), net of tax:
Derivative adjustments												$ 0	$ 159	$ 712

[1] Included in net income are $0.8 million in transaction costs in the second quarter of fiscal 2013, $8.3 million in transaction costs in the third quarter of fiscal 2013 and $14.2 million in the fourth quarter relating to the Terra Transaction, Rothsay Acquisition and the VION Acquisition.