CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 24, 2012
Cash flows from operating activities:
Net income (loss)	$ 245,019	$ 108,751
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	75,939	71,980
Foreign currency transaction losses	1,338	1,948
Accretion of bond discount	228	228
Asset impairment		1,342
Loss (gain) on property disposals	(824)	628
Share-based compensation	1,603	299
Changes in operating assets and liabilities:
Restricted cash and cash equivalents		8,013
Trade accounts and other receivables	(7,654)	(2,123)
Inventories	(579)	(109,638)
Prepaid expenses and other current assets	(15,114)	8,763
Accounts payable, accrued expenses and other current liabilities	7,097	7,403
Income taxes	4,687	(14,698)
Deposits	480	160
Long-term pension and other postretirement obligations	(2,149)
Other operating assets and liabilities	856	(2,734)
Cash provided by operating activities	310,927	80,322
Cash flows from investing activities:
Acquisitions of property, plant and equipment	(48,969)	(37,561)
Purchases of investment securities		(162)
Proceeds from sale or maturity of investment securities		58
Proceeds from property disposals	2,883	12,461
Cash used in investing activities	(46,086)	(25,204)
Cash flows from financing activities:
Proceeds from revolving line of credit	505,600	391,300
Payments on revolving line of credit, long-term borrowings and capital lease obligations	(758,251)	(584,904)
Payment of note payable to JBS USA Holdings, Inc.		(50,000)
Proceeds from sale of common stock		198,282
Cash used in financing activities	(252,651)	(45,322)
Effect of exchange rate changes on cash and cash equivalents	(2,139)	(2,178)
Increase in cash and cash equivalents	10,051	7,618
Cash and cash equivalents, beginning of period	68,180	41,609
Cash and cash equivalents, end of period	$ 78,231	$ 49,227