Correction Prior Period (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 28, 2014	Mar. 29, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Cost of sales and operating expenses	$ 747,966		$ 309,922	$ 1,492,945	$ 632,608
Selling, general and administrative expenses	111,845		40,793	217,248	83,086
Feed Ingredients [Member]
Cost of sales and operating expenses	431,549	442,666	308,326	869,197	629,659
Selling, general and administrative expenses	53,963	55,749	33,108	110,167	67,194
Feed Ingredients [Member] | Previously Reported [Member]
Cost of sales and operating expenses		446,039
Selling, general and administrative expenses		52,376
Feed Ingredients [Member] | Adjustment [Member]
Cost of sales and operating expenses		(3,373)
Selling, general and administrative expenses		3,373
Food Ingredients [Member]
Cost of sales and operating expenses	256,153	229,838	0	512,148	0
Selling, general and administrative expenses	42,447	33,315	0	76,437	0
Food Ingredients [Member] | Previously Reported [Member]
Cost of sales and operating expenses		235,358
Selling, general and administrative expenses		27,795
Food Ingredients [Member] | Adjustment [Member]
Cost of sales and operating expenses		(5,520)
Selling, general and administrative expenses		5,520
Fuel Ingredients [Member]
Cost of sales and operating expenses	60,278	72,596	1,679	111,630	3,040
Selling, general and administrative expenses	5,998	6,396	95	11,133	191
Fuel Ingredients [Member] | Previously Reported [Member]
Cost of sales and operating expenses		74,177
Selling, general and administrative expenses		4,815
Fuel Ingredients [Member] | Adjustment [Member]
Cost of sales and operating expenses		(1,581)
Selling, general and administrative expenses		1,581
Corporate [Member]
Cost of sales and operating expenses	(14)	(121)	(83)	(30)	(91)
Selling, general and administrative expenses	9,437	9,943	7,590	19,511	15,701
Corporate [Member] | Previously Reported [Member]
Cost of sales and operating expenses		(121)
Selling, general and administrative expenses		9,943
Corporate [Member] | Adjustment [Member]
Cost of sales and operating expenses		0
Selling, general and administrative expenses		0
Operating Segments [Member]
Cost of sales and operating expenses	747,966	744,979	309,922	1,492,945	632,608
Selling, general and administrative expenses	111,845	105,403	40,793	217,248	83,086
Operating Segments [Member] | Previously Reported [Member]
Cost of sales and operating expenses		755,453
Selling, general and administrative expenses		94,929
Operating Segments [Member] | Adjustment [Member]
Cost of sales and operating expenses		(10,474)
Selling, general and administrative expenses		$ 10,474