Financial Instruments Measured at Fair Value - Derivatives (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended							3 Months Ended				9 Months Ended												3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended
	Sep. 28, 2013	Sep. 28, 2013	Dec. 31, 2012	Sep. 28, 2013 6.875% senior notes, due 2013 [Member]	Sep. 28, 2013 Interst Rate Swaps Converting Senior Notes Due in 2013 [Member]	Dec. 31, 2012 Interst Rate Swaps Converting Senior Notes Due in 2013 [Member]	Sep. 28, 2013 Not Designated as Hedging Instrument [Member]	Dec. 31, 2012 Not Designated as Hedging Instrument [Member]	Sep. 28, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 29, 2012 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Sep. 28, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Sep. 28, 2013 Designated as Hedging Instrument [Member]	Dec. 31, 2012 Designated as Hedging Instrument [Member]	Sep. 28, 2013 Cash Flow Hedging [Member] Interest Rate Swap [Member] Accrued Liabilities [Member]	Dec. 31, 2012 Cash Flow Hedging [Member] Interest Rate Swap [Member] Accrued Liabilities [Member]	Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 29, 2012 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 29, 2012 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 29, 2012 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 29, 2012 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Dec. 31, 2012 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Dec. 31, 2012 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Sep. 28, 2013 2013 Acquisition [Member]	Sep. 28, 2013 2012 Acquisition [Member]	Sep. 28, 2013 Contingent Consideration [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Contingent Consideration [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	$ (926)	$ (926)	$ (10,939)			$ (10,832)	$ (598)	$ (495)									$ 1,227	$ 1,561	$ (1,825)	$ (2,056)	$ (328)	$ (10,444)	$ 0	$ (10,832)																	$ 333	$ 433	$ (661)	$ (45)
Derivative Instruments, Gain (Loss) Recognized in Income, Net									51	[1]	(343)	[1]	(889)	[1]	(1,688)	[1]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net																									0	[2]	(2,155)	[2]	3,132	[2]	(8,234)	[2]	(253)	[3]	370	[3]	(753)	[3]	606	[3]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net																									(157)	[2]			(379)	[2]	0	[2]	(48)	[3]	10	[3]	432	[3]	(47)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net																									0	[2]	0	[2]	292	[2]	0	[2]	0	[3]	0	[3]	0	[3]	0	[3]
Debt Instrument, Interest Rate, Stated Percentage				6.875%	2.63%
Notional Amount of Interest Rate Derivatives					175,000
Cash Paid for Termination of Net Investment Hedges	7,700
Derivative Instrument Gain Loss Reclassified Into Income, Net	(157)	(87)
Notional Amount of Foreign Currency Derivatives	361,944	361,944	425,053
Business Acquisition, Contingent Consideration, Potential Cash Payment																																													5,400	18,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value																																															$ 1,813	$ 806

[1] The amount of gain (loss) recognized in income on derivatives is recorded in "Cost of sales" in the company's consolidated statements of operations.

[2] Both the effective and ineffective portions of any gain (loss) reclassified or recognized in income are recorded in "Interest and other financing expense, net" in the company's consolidated statements of operations.

[3] Both the effective and ineffective portions of any gain (loss) reclassified or recognized in income are recorded in "Cost of sales" in the company's consolidated statements of operations.