Financial Instruments Measured at Fair Value - Derivatives (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								3 Months Ended										3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Dec. 31, 2013	Dec. 31, 2013 6.875% senior notes, due 2013 [Member]	Mar. 30, 2013 6.875% senior notes, due 2013 [Member]	Dec. 31, 2011 Interst Rate Swaps Converting Senior Notes Due in 2013 [Member]	Mar. 29, 2014 Not Designated as Hedging Instrument [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member]	Mar. 29, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Mar. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Mar. 29, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Mar. 29, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Mar. 29, 2014 Designated as Hedging Instrument [Member]	Dec. 31, 2013 Designated as Hedging Instrument [Member]	Mar. 29, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Mar. 30, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Mar. 29, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Mar. 30, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Mar. 29, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Mar. 29, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Mar. 29, 2014 2014 Acquisition [Member]	Mar. 29, 2014 2013 Acquisition [Member]	Mar. 29, 2014 2013 Acquisition [Member]	Mar. 29, 2014 Contingent Consideration [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Contingent Consideration [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 362,489		$ 445,684			$ 175,000
Derivative, Fair Value, Net	1,003		(654)				1,260	(819)					2,001	1,275	(741)	(2,094)	(257)	165									253	368	(510)	(203)
Debt Instrument, Interest Rate, Stated Percentage				6.875%	6.875%	2.63%
Cash Paid for Termination of Net Investment Hedges		7,700
Derivative Instrument Gain Loss Reclassified Into Income, Net	(161)	292
Derivative Instruments, Gain (Loss) Recognized in Income, Net									1,913	[1]	(1,134)	[1]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net																			0	[2]	3,132	[2]	(368)	[3]	(59)	[3]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net																			(161)	[2]	0	[2]	136	[3]	252	[3]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net																			0	[2]	292	[2]	0	[3]	0	[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value																																		11,606	5,845
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High																															9,000	6,000	23,400
Fair Value Measurement Contingent Consideration-Current																																		3,657	2,123
Fair Value Measurement Contingent Consideration Non-Current																																		$ 7,949	$ 3,722

[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.