Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

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Monetary amount specified by the derivative(s). Expressed as an absolute value.

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Payments under business acquisition contingent consideration arragement including cash and shares.

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Market value as at the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

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Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

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The percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Description of the relevant terms of the derivative. Includes the type of instrument, risk being hedged, notional amount, counterparty, inception date, maturity date, relevant interest rates, strike price, cap price, and floor price.

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Fixed interest rate related to the interest rate derivative.

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The date the entity entered into the derivative.

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The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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Aggregate notional amount of foreign currency derivatives to purchase a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Amount of net unrealized gain (loss) related to the change in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective.

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Derivative financial instruments and fair value measurements (Narrative) (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended																				1 Months Ended
	Sep. 29, 2012 USD ($)	Oct. 01, 2011 USD ($)	Sep. 29, 2012 USD ($)	Oct. 01, 2011 USD ($)	Sep. 29, 2012 Fair Value, Inputs, Level 2 [Member] USD ($)	Sep. 29, 2012 Fair Value, Inputs, Level 2 [Member] EUR (€)	Dec. 31, 2011 Fair Value, Inputs, Level 2 [Member] USD ($)	Sep. 29, 2012 Opta Minerals Inc [Member] CAD	Sep. 29, 2012 Opta Minerals Inc [Member] USD USD ($)	Sep. 29, 2012 Babco [Member] USD ($)	Feb. 10, 2012 Babco [Member] USD ($)	Sep. 29, 2012 Edner Of Nevada [Member] USD ($)	Sep. 29, 2012 Maximum [Member] Opta Minerals Inc [Member]	Sep. 29, 2012 Minimum [Member] Opta Minerals Inc [Member]	Sep. 29, 2012 Corn [Member] bu	Sep. 29, 2012 Soybean [Member] bu	Sep. 29, 2012 Cocoa [Member] lots	Feb. 29, 2012 Interest Rate Swap [Member] Babco [Member] Opta Minerals Inc [Member]	Feb. 29, 2012 Interest Rate Swap [Member] Babco [Member] Opta Minerals Inc [Member] CAD	Feb. 29, 2012 Interest Rate Swap [Member] Babco [Member] Opta Minerals Inc [Member] USD USD ($)	Feb. 29, 2012 Interest Rate Swap [Member] Maximum [Member] Babco [Member] Opta Minerals Inc [Member]	Feb. 29, 2012 Interest Rate Swap [Member] Minimum [Member] Babco [Member] Opta Minerals Inc [Member]	Feb. 29, 2012 FebruaryTwo Thousand And Twelve Interest Rate Swap At One Eight Five Percent [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 3,074	$ 36	$ 1,178	$ 3,272
Derivative, Nonmonetary Notional Amount																	132
Inventories Carried At Market Unit															592,399	644,928
Derivative, Description of Terms																							5
Derivative, Inception Date																							Feb. 01, 2012
Derivative, Notional Amount								34,581	34,000										19,000	19,324
Derivative, Fixed Interest Rate																		1.85%
Debt Instrument, Basis Spread on Variable Rate													3.50%	2.00%							3.50%	2.00%
Notional Amount of Foreign Currency Derivative Purchase Contracts					7,403	10,129
Unrealized Gain Loss On Foreign Currency Derivatives Net Before Tax	16	359	304	554
Business Acquisition, Contingent Consideration, at Fair Value					0		0			617	615
Business Acquisition Contingent Consideration Payments												$ 388