Business Segment Information (Tables)

9 Months Ended

Sep. 24, 2011

Business Segment Information

Schedule of sales and other financial information by business segment

		Three Months Ended				Nine Months Ended
		September 24, 2011		September 25, 2010		September 24, 2011		September 25, 2010
Research Models and Services
	Net sales	$	171,471	$	159,259	$	523,005	$	498,604
	Gross margin		70,514		64,383		222,660		210,008
	Operating income		48,534		42,817		155,967		140,059
	Depreciation and amortization		9,327		9,422		27,914		27,954
	Capital expenditures		5,789		4,622		14,202		15,827
Preclinical Services
	Net sales	$	106,108	$	111,626	$	328,680	$	353,160
	Gross margin		22,202		26,117		79,014		81,447
	Operating income		3,663		5,178		20,844		12,116
	Depreciation and amortization		11,840		14,063		36,334		42,036
	Capital expenditures		2,433		4,505		7,470		11,025

Reconciliation of segment operating income to consolidated operating income

	Three Months Ended						Nine Months Ended
	September 24, 2011			September 25, 2010			September 24, 2011			September 25, 2010
Total segment operating income	$	52,197		$	47,995		$	176,811		$	152,175
Unallocated corporate overhead		(15,103	)		(11,527	)		(44,152	)		(55,528	)
Termination fee		—			(30,000	)		—			(30,000	)
Consolidated operating income	$	37,094		$	6,468		$	132,659		$	66,647

Schedule of net sales for each significant service area

		Three Months Ended				Nine Months Ended
		September 24, 2011		September 25, 2010		September 24, 2011		September 25, 2010
Research models		$	86,386	$	84,234	$	269,976	$	267,690
Research model services			54,539		50,575		161,936		153,536
Other products			30,546		24,450		91,093		77,378
	Total research models		171,471		159,259		523,005		498,604
	Total preclinical services		106,108		111,626		328,680		353,160
Total sales		$	277,579	$	270,885	$	851,685	$	851,764

Summary of unallocated corporate overhead

	Three Months Ended						Nine Months Ended
	September 24, 2011			September 25, 2010			September 24, 2011			September 25, 2010
Stock-based compensation expense	$	2,825		$	3,249		$	8,339		$	9,864
U.S. retirement plans		501			1,162			2,613			2,819
Audit, tax and related expenses		855			659			2,115			1,858
Salary and bonus		3,187			4,144			12,522			13,443
Global IT		3,089			3,373			9,623			9,950
Employee health and fringe cost		(2,307	)		(1,776	)		7			(800	)
Consulting and professional services		2,628			1,315			6,160			6,197
Depreciation		1,569			1,558			4,743			4,199
Transaction (acquisition/disposition) costs		251			(810	)		565			6,587
Life insurance death benefit gain		—			—			(7,710	)		—
Other general unallocated corporate expenses		2,505			(1,347	)		5,175			1,411
	$	15,103		$	11,527		$	44,152		$	55,528