Acquisitions (Details Textual) (USD $)	9 Months Ended		0 Months Ended	7 Months Ended		0 Months Ended																9 Months Ended
	Sep. 29, 2013	Dec. 30, 2012	Feb. 21, 2013 Verinata [Member]	Sep. 29, 2013 Verinata [Member]	Sep. 29, 2013 Development stage company and ALL [Member]	Sep. 19, 2012 BlueGnome [Member]	Jan. 10, 2011 Epicentre [Member] years	Feb. 21, 2013 Developed Technology [Member] Verinata [Member]	Jan. 01, 2013 Developed Technology [Member] Development Stage Entity One [Member]	Jul. 02, 2013 Developed Technology [Member] ALL [Member]	Sep. 19, 2012 Developed Technology [Member] BlueGnome [Member]	Jan. 10, 2011 Developed Technology [Member] Epicentre [Member]	Feb. 21, 2013 Customer Relationships [Member] Verinata [Member]	Sep. 19, 2012 Customer Relationships [Member] BlueGnome [Member]	Jan. 10, 2011 Customer Relationships [Member] Epicentre [Member]	Feb. 21, 2013 Trade Names [Member] Verinata [Member]	Sep. 19, 2012 Trade Names [Member] BlueGnome [Member]	Jan. 10, 2011 Trade Names [Member] Epicentre [Member]	Feb. 21, 2013 Minimum [Member] Verinata [Member]	Feb. 21, 2013 Maximum [Member] Verinata [Member]	Feb. 21, 2013 Building [Member] Verinata [Member]	Sep. 29, 2013 Transaction Cost [Member] Verinata [Member]
Acquisition [Abstract]
Contractual Price			$ 350,000,000
Contingent consideration payments, maximum			100,000,000			20,000,000	15,000,000
Business Combination, Consideration Transferred			396,267,000			95,500,000	71,400,000
Business acquisition cash consideration			339,300,000			88,000,000	59,400,000
Fair value of contingent consideration to be settled in cash			56,200,000			7,500,000	7,400,000
Fair value of assumed equity attributed to pre-combination services			300,000
Loss realized on settlement of preexisting relationships			500,000
Amount deposited into escrow consideration otherwise payable to shareholders			30,000,000
Escrow period			1 year 6 months
Transaction costs																						3,200,000
Number of options acquired entity's options converted into (in shares)	512,000		400,000
Fair value of converted options			18,900,000
Acquirer Share Price (in dollars per share)			$ 48.36
Fair value assumptions, converted options, Expected term (in years)			2 years 4 months
Fair value assumptions, converted options, risk-free interest rate			0.32%
Fair value assumptions, converted options, expected volatility rate			42.00%
Fair value inputs, converted options, expected dividends			0.00%
Weighted average fair value per share (in dollars per share)			$ 42.63
Business Combination, Contingent Consideration, Liability			56,200,000
Fair value inputs, discount rate						30.00%	21.00%												6.00%	20.00%
Fair value assumptions, expected volatility rate			50.00%
Fair value assumptions, risk free interest rate			0.26%
Goodwill, purchase accounting adjustments				8,200,000
Adjustment to fair value of contingent milestone payments included in purchase price during measurement period				4,900,000
Adjustment to intangible assets during measurement period				(6,300,000)
Adjustment to deferred tax liability during measurement period				1,800,000
Building useful life																					30 years
Future minimum payments due remaining as of acquisition date			5,700,000
Remaining Lease Term			4 years 8 months
Number of Lease Renewal Options			2
Lease Renewal Option Term			3 years
Goodwill	667,192,000	369,327,000	220,884,000		76,900,000	47,500,000	43,600,000
Consideration to identified intangible assets			176,490,000			48,900,000	26,900,000		15,600,000	28,000,000	25,000,000	23,300,000		16,800,000	1,100,000		7,100,000	2,500,000
Weighted average useful life of identified intangible assets (in years)								13 years	5 years	11 years	7 years	9 years	5 years	5 years	3 years	2 years	10 years	10 years
Fair value of contingent compensation						20,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets						11,200,000	900,000
Deferred tax liabilities related to intangible ssets						12,100,000
Fair value of contingent consideration to be settled in stock							4,600,000
Shares issued to shareholders in connection with business acquisition (in shares)							200,000
Portion of shares issued included in purchase price							33.33%
Fair value of shares as contingent compensation for post acquisition service							$ 10,100,000
Recognition period of fair value of shares as contingent compensation for post acquisition service (in years)							2