Fair Value Measurements of Financial Instruments (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jan. 02, 2016	Jan. 03, 2015
Assets Fair Value Disclosure [Abstract]
Derivative financial instruments	$ (1,252)	$ (1,374)
Government Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	9,663	9,835
Corporate Bonds [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	2,405	2,205
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets Fair Value Disclosure [Abstract]
Derivative financial instruments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Government Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate Bonds [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets Fair Value Disclosure [Abstract]
Derivative financial instruments	(1,252)	(1,374)
Significant Other Observable Inputs (Level 2) [Member] | Government Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	9,663	9,835
Significant Other Observable Inputs (Level 2) [Member] | Corporate Bonds [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	2,405	2,205
Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Derivative financial instruments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Government Securities [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	0	0
Significant Unobservable Inputs (Level 3) [Member] | Corporate Bonds [Member]
Assets Fair Value Disclosure [Abstract]
Available-for-sale securities, fair value disclosure	$ 0	$ 0