Financial Data by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Net sales:
Net sales	$ 439,898	$ 291,538	$ 862,482	$ 578,620
Operating income (loss):
Operating income (loss):	(5,702)	8,305	3,449	17,685
Special charges, net	(24,264)	(1,750)	(32,975)	(3,554)
Depreciation and amortization expense:
Depreciation and amortization expense:	26,908	17,274	51,515	33,426
Unallocated Corporate
Capital spending:	19,685	12,183	33,800	26,500
North America
Net sales:
Net sales	195,425	136,346	388,723	272,224
Unallocated Corporate
Capital spending:	10,807	1,136	16,858	1,959
South America
Net sales:
Net sales	139,458	72,938	283,079	151,212
Unallocated Corporate
Capital spending:	1,512	501	4,021	1,049
Europe
Net sales:
Net sales	46,173	42,428	93,688	80,395
Unallocated Corporate
Capital spending:	4,884	9,964	7,484	22,523
Oriented Polymers
Net sales:
Net sales	58,842	39,826	96,992	74,789
Unallocated Corporate
Capital spending:	1,525	198	3,734	318
Unallocated Corporate
Operating income (loss):
Operating income (loss):	(16,838)	(14,364)	(30,091)	(24,055)
Depreciation and amortization expense:
Depreciation and amortization expense:	(293)	421	48	853
Unallocated Corporate
Capital spending:	957	384	1,703	651
Eliminations
Operating income (loss):
Operating income (loss):	(93)	(19)	(130)	(50)
Unallocated Amount to Segment
Depreciation and amortization expense:
Depreciation and amortization expense:	1,274	607	2,300	1,214
Operating Segments
Operating income (loss):
Operating income (loss):	18,562	10,055	36,424	21,239
Depreciation and amortization expense:
Depreciation and amortization expense:	25,634	16,667	49,215	32,212
Operating Segments | North America
Operating income (loss):
Operating income (loss):	22,976	14,357	40,758	25,858
Depreciation and amortization expense:
Depreciation and amortization expense:	9,684	6,319	19,513	12,814
Operating Segments | South America
Operating income (loss):
Operating income (loss):	4,093	3,419	10,325	6,712
Depreciation and amortization expense:
Depreciation and amortization expense:	7,900	3,004	13,786	6,063
Operating Segments | Europe
Operating income (loss):
Operating income (loss):	4,707	5,035	8,859	9,589
Depreciation and amortization expense:
Depreciation and amortization expense:	5,524	4,808	11,096	8,197
Operating Segments | Oriented Polymers
Operating income (loss):
Operating income (loss):	3,717	1,627	6,703	3,185
Depreciation and amortization expense:
Depreciation and amortization expense:	$ 2,819	$ 2,115	$ 4,772	$ 4,285