Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 29, 2014

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:

	March 29, 2014					December 28, 2013
	Gross Carrying Amount		Accumulated Amortization & Impairment Loss			Gross Carrying Amount		Accumulated Amortization & Impairment Loss
Backlog	$	2,916	$	(2,533	)	$	2,916	$	(2,507	)
Client relationships	307,383		(238,138		)	311,507		(238,002		)
Trademarks and trade names	5,398		(5,012		)	5,399		(4,997		)
Standard operating procedures	2,754		(1,645		)	2,754		(1,498		)
Other identifiable intangible assets	10,481		(5,591		)	10,432		(4,905		)
Total other intangible assets	$	328,932	$	(252,919	)	$	333,008	$	(251,909	)

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 28, 2013			Acquisitions		Foreign Exchange			March 29, 2014
Research Models and Services
Gross carrying amount	$	83,551		$	—	$	(361	)	$	83,190
Preclinical Services
Gross carrying amount	1,152,150			—		(19		)	1,152,131
Accumulated impairment loss	(1,005,000		)						(1,005,000		)
Total
Gross carrying amount	$	1,235,701		$	—	$	(380	)	$	1,235,321
Accumulated impairment loss	(1,005,000		)						(1,005,000		)
Goodwill, net	$	230,701							$	230,321