Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure Segment Information [Abstract]

Segment Reporting Information, by Segment

Segment information for the three and nine months ended September 30, 2016 and October 2, 2015 follows:

Revenues

	Three Months Ended				Nine Months Ended
(In thousands)	September 30, 2016		October 2, 2015		September 30, 2016		October 2, 2015
Engineering and Other Scientific	$	61,237	$	61,052	$	187,026	$	180,212
Environmental and Health		16,375		17,942		51,037		58,939
Total revenues	$	77,612	$	78,994	$	238,063	$	239,151

Operating Income

	Three Months Ended				Nine Months Ended
(In thousands)	September 30, 2016		October 2, 2015		September 30, 2016		October 2, 2015
Engineering and Other Scientific	$	19,933	$	20,252	$	60,632	$	58,605
Environmental and Health		4,758		5,039		13,981		18,134
Total segment operating income		24,691		25,291		74,613		76,739
Corporate operating expense		(9,096)		(4,370)		(27,651)		(22,085)
Total operating income	$	15,595	$	20,921	$	46,962	$	54,654

Capital Expenditures

	Three Months Ended				Nine Months Ended
(In thousands)	September 30, 2016		October 2, 2015		September 30, 2016		October 2, 2015
Engineering and Other Scientific	$	902	$	1,057	$	3,365	$	2,268
Environmental and Health		33		52		94		123
Total segment capital expenditures		935		1,109		3,459		2,391
Corporate capital expenditures		8,746		1,532		9,604		1,964
Total capital expenditures	$	9,681	$	2,641	$	13,063	$	4,355

Depreciation and Amortization

	Three Months Ended				Nine Months Ended
(In thousands)	September 30, 2016		October 2, 2015		September 30, 2016		October 2, 2015
Engineering and Other Scientific	$	1,136	$	951	$	3,273	$	2,877
Environmental and Health		45		46		133		133
Total segment depreciation and amortization		1,181		997		3,406		3,010
Corporate depreciation and amortization		401		332		1,103		1,024
Total depreciation and amortization	$	1,582	$	1,329	$	4,509	$	4,034