Derivative Instruments and Hedging Activities (Details) (USD $)	0 Months Ended		12 Months Ended
	Jan. 03, 2013	Jan. 04, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments			$ 128,200,000	$ 67,800,000
Derivative, Fair Value, Net			35,000	(219,000)
Gain (Loss) on Derivative Instruments, Net, Pretax			(477,000)	(20,000)	1,131,000
Derivative, Average Remaining Maturity	3 days	4 days
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Fair Value, Gross Asset			177,000	100,000
Derivative Liability, Fair Value, Gross Liability			(142,000)	(178,000)
Gain (Loss) on Derivative Instruments, Net, Pretax			(618,000)	(23,000)	1,055,000
Embedded Derivative Financial Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax			141,000	3,000	76,000
Derivative Liability, Fair Value, Net			$ 0	$ (141,000)
Minimum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency forward contract term			1
Maximum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency forward contract term			14