Business Combinations (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended				1 Months Ended	12 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012	Dec. 30, 2012	Jun. 30, 2013	Jul. 01, 2012	Jan. 01, 2012	Nov. 30, 2012 Human Health [Member] Haoyuan Biotech Co. [Member]	Dec. 30, 2012 Trade Names [Member] Human Health [Member] Haoyuan Biotech Co. [Member]	Dec. 30, 2012 Core Technology [Member] Human Health [Member] Haoyuan Biotech Co. [Member]
Business Acquisition [Line Items]
Cash paid to the shareholders									$ 38,000,000
Working capital adjustments									2,729,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value									1,900,000
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life										8 years	8 years
Total transaction costs	0	300,000	100,000	600,000
Number of Years in Measurement Period from Acquisition Date to Change Underlying Assumptions					1 year
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	37,000,000		37,000,000						30,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	$ 2,858,000	$ 1,206,000	$ 2,858,000	$ 1,206,000	$ 3,017,000	$ 3,715,000	$ 7,315,000	$ 20,298,000
Business Combination, Contingent Consideration Arrangements, Maximum Period			3 years
Business Combination, Contingent Consideration Arrangements, Description			Contingent consideration is measured at fair value at the acquisition date, based on the probability that revenue thresholds or product development milestones will be achieved during the earnout period. The earnout periods for each of these acquisitions do not exceed three years from the acquisition date.