The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.

+ References+ Details

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

+ References+ Details

- Definition

Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

+ References+ Details

Restructuring and Lease Charges, Net (Narrative) (Details) (USD $)	3 Months Ended			3 Months Ended						3 Months Ended						3 Months Ended		3 Months Ended			3 Months Ended						3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011	Jan. 01, 2012	Apr. 01, 2012 Contract Termination [Member]	Apr. 01, 2012 Q1 2012 Restructuring Plan [Member] employees	Apr. 01, 2012 Q1 2012 Restructuring Plan [Member] Human Health [Member]	Apr. 01, 2012 Q1 2012 Restructuring Plan [Member] Environmental Health [Member]	Apr. 01, 2012 Q1 2012 Restructuring Plan [Member] Severance [Member]	Apr. 01, 2012 Q1 2012 Restructuring Plan [Member] Closure Of Excess Facility Space [Member]	Apr. 01, 2012 Q4 2011 Restructuring Plan [Member]	Jan. 01, 2012 Q4 2011 Restructuring Plan [Member]	Jan. 01, 2012 Q4 2011 Restructuring Plan [Member] Human Health [Member]	Jan. 01, 2012 Q4 2011 Restructuring Plan [Member] Environmental Health [Member]	Apr. 01, 2012 Q4 2011 Restructuring Plan [Member] Severance [Member]	Jan. 01, 2012 Q4 2011 Restructuring Plan [Member] Severance [Member]	Apr. 01, 2012 Q4 2011 Restructuring Plan [Member] Closure Of Excess Facility Space [Member]	Jan. 01, 2012 Q4 2011 Restructuring Plan [Member] Closure Of Excess Facility Space [Member]	Jul. 03, 2011 Q2 2011 Restructuring Plan [Member] employees	Apr. 01, 2012 Q2 2011 Restructuring Plan [Member]	Jan. 01, 2012 Q2 2011 Restructuring Plan [Member]	Jul. 03, 2011 Q2 2011 Restructuring Plan [Member] Human Health [Member]	Jul. 03, 2011 Q2 2011 Restructuring Plan [Member] Environmental Health [Member]	Apr. 01, 2012 Q2 2011 Restructuring Plan [Member] Severance [Member]	Jan. 01, 2012 Q2 2011 Restructuring Plan [Member] Severance [Member]	Apr. 01, 2012 Q2 2011 Restructuring Plan [Member] Closure Of Excess Facility Space [Member]	Jan. 01, 2012 Q2 2011 Restructuring Plan [Member] Closure Of Excess Facility Space [Member]	Apr. 01, 2012 Previous restructuring and integration plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges before tax	$ 6,159,000	$ 0				$ 5,300,000	$ 400,000					$ 2,300,000	$ 4,600,000								$ 2,200,000	$ 3,400,000
Additional accrual for estimated sublease rental payments and (reversal) related to lower than expected cost associated with workforce reductions										(135,000)				0		(135,000)											200,000
Number of employees reduced					129						114							72
Remaining payments	15,056,000		13,958,000	2,400,000	3,789,000			3,710,000	79,000	2,844,000	5,044,000			2,669,000	4,674,000	175,000	370,000		1,014,000	1,283,000			1,014,000	1,283,000	0	0	13,400,000
Other Restructuring Costs				300,000
Payments for Restructuring																											$ 1,300,000