Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 28, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Other Intangible Assets not Subject to Amortization and Other Intangible Assets that Continue to be Subject to Amortization

The following table displays the gross carrying amount and accumulated amortization of definite-lived intangible assets by major class:

	September 28, 2013					December 29, 2012
	Gross Carrying Amount		Accumulated Amortization & Impairment Loss			Gross Carrying Amount		Accumulated Amortization & Impairment Loss
Backlog	$	2,899	$	(2,469	)	$	2,875	$	(2,375	)
Client relationships	313,595		(238,245		)	305,178		(231,902		)
Client contracts	15,339		(15,339		)	15,366		(15,366		)
Trademarks and trade names	5,380		(4,949		)	5,326		(4,821		)
Standard operating procedures	2,753		(1,339		)	2,751		(863		)
Other identifiable intangible assets	10,384		(4,202		)	10,033		(4,718		)
Total other intangible assets	$	350,350	$	(266,543	)	$	341,529	$	(260,045	)

Schedule of Changes in the Gross Carrying Amount and Accumulated Amortization of Goodwill

The changes in the gross carrying amount and accumulated impairment loss of goodwill are as follows:

				Adjustments to Goodwill
	December 29, 2012			Acquisitions		Foreign Exchange		September 28, 2013
Research Models and Services
Gross carrying amount	$	63,139		$	19,273	$	361	$	82,773
Preclinical Services
Gross carrying amount	1,150,470			—		1,028		1,151,498
Accumulated impairment loss	(1,005,000		)					(1,005,000		)
Total
Gross carrying amount	$	1,213,609		$	19,273	$	1,389	$	1,234,271
Accumulated impairment loss	(1,005,000		)					(1,005,000		)
Goodwill, net	$	208,609						$	229,271