Business Segments (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	Dec. 28, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 955,800	$ 425,786	$ 2,894,194	$ 1,294,801
Cost of sales and operating expenses	725,170	310,089	2,218,115	942,697
Selling, general and administrative expenses	111,203	42,588	328,451	124,843
Depreciation and amortization	67,311	23,131	200,478	67,074
Operating income	49,925	41,652	124,846	151,030
Equity in net income/ (loss) of unconsolidated subsidiaries	(1,055)	11,953	6,062	8,796
Nonoperating Income (Expense)	(21,780)	(8,581)	(123,036)	(19,226)
Income/ (loss) before income taxes	27,090	45,024	7,872	140,600
Assets	5,377,856		5,377,856		3,244,133
Feed Ingredients [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	583,408	423,661	1,753,095	1,288,809
Cost of sales and operating expenses	446,495	308,326	1,315,692	937,985
Gross Margin	136,913	115,335	437,403	350,824
Selling, general and administrative expenses	52,943	35,178	163,110	102,372
Acquisition and integration costs	0	0	0	0
Depreciation and amortization	37,720	21,324	116,145	63,497
Operating income	46,250	58,833	158,148	184,955
Equity in net income/ (loss) of unconsolidated subsidiaries	426	0	1,390	0
Segment income	46,676	58,833	159,538	184,955
Assets	2,754,492		2,754,492		1,986,564
Food Ingredients [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	301,398	0	926,222	0
Cost of sales and operating expenses	226,604	0	738,752	0
Gross Margin	74,794	0	187,470	0
Selling, general and administrative expenses	42,244	0	118,681	0
Acquisition and integration costs	0	0	0	0
Depreciation and amortization	18,503	0	55,572	0
Operating income	14,047	0	13,217	0
Equity in net income/ (loss) of unconsolidated subsidiaries	0	0	0	0
Segment income	14,047	0	13,217	0
Assets	1,798,152		1,798,152		0
Fuel Ingredients [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	70,994	2,125	214,877	5,992
Cost of sales and operating expenses	52,041	1,672	163,671	4,712
Gross Margin	18,953	453	51,206	1,280
Selling, general and administrative expenses	7,259	60	18,392	251
Acquisition and integration costs	0	0	0	0
Depreciation and amortization	8,780	34	21,976	96
Operating income	2,914	359	10,838	933
Equity in net income/ (loss) of unconsolidated subsidiaries	(1,481)	11,953	4,672	8,796
Segment income	1,433	12,312	15,510	9,729
Assets	661,417		661,417		179,722
Corporate [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	0	0	0	0
Cost of sales and operating expenses	30	91	0	0
Gross Margin	(30)	(91)	0	0
Selling, general and administrative expenses	8,757	7,350	28,268	22,220
Acquisition and integration costs	2,191	8,326	22,304	9,157
Depreciation and amortization	2,308	1,773	6,785	3,481
Operating income	(13,286)	(17,540)	(57,357)	(34,858)
Equity in net income/ (loss) of unconsolidated subsidiaries	0	0	0	0
Segment income	(13,286)	(17,540)	(57,357)	(34,858)
Assets	163,795		163,795		1,077,847
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	955,800	425,786	2,894,194	1,294,801
Cost of sales and operating expenses	725,170	310,089	2,218,115	942,697
Gross Margin	230,630	115,697	676,079	352,104
Selling, general and administrative expenses	111,203	42,588	328,451	124,843
Acquisition and integration costs	2,191	8,326	22,304	9,157
Depreciation and amortization	67,311	23,131	200,478	67,074
Operating income	49,925	41,652	124,846	151,030
Equity in net income/ (loss) of unconsolidated subsidiaries	(1,055)	11,953	6,062	8,796
Segment income	48,870	53,605	130,908	159,826
Assets	$ 5,377,856		$ 5,377,856		$ 3,244,133