Goodwill and Acquired Intangibles (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Changes in the carrying amount of goodwill
Balance at beginning of period	$ 233,266	$ 192,125
Effect of foreign currency translation	(4,320)	420
Balance at end of period	456,905	233,266
Goodwill resulting from acquisitions [Member]
Changes in the carrying amount of goodwill
Goodwill acquired during the period	227,959	39,680
Additions due to contingent consideration [Member]
Changes in the carrying amount of goodwill
Goodwill acquired during the period		$ 1,041	[1]

[1] Cadence accounts for business combinations with acquisition dates on or before January 3, 2009 under the purchase method in accordance with accounting standards that were authoritative at that time, whereby contingent consideration is added to goodwill as it is earned.