Fair Value of Financial Instruments (Details 3) - Contingent consideration - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2015	Jul. 04, 2015	Jan. 03, 2015
Monte Carlo simulation
Quantitative information for Level 3 fair value measurements liabilities
Expected revenue volatility (as a percent)	20.00%
Low end of range | Monte Carlo simulation
Quantitative information for Level 3 fair value measurements liabilities
Expected revenue growth rate (as a percent)	38.60%
Expected term	3 months 18 days
Estimated discount rate (as a percent)	0.34%
High end of range | Monte Carlo simulation
Quantitative information for Level 3 fair value measurements liabilities
Expected revenue growth rate (as a percent)	47.00%
Expected term	3 years 3 months 18 days
Estimated discount rate (as a percent)	1.44%
Assets and liabilities measured at fair value on recurring basis
Quantitative information for Level 3 fair value measurements liabilities
Fair value at the end of the period	$ 13,262	$ 15,092	$ 18,438