Segment Reporting (Tables)

9 Months Ended

Sep. 29, 2017

Segment Reporting [Abstract]

Segment Reporting Information, by Segment

Segment information for the three and nine months ended September 29, 2017 and September 30, 2016 follows:

Revenues

	Three Months Ended				Nine Months Ended
	September 29,		September 30,		September 29,		September 30,
(In thousands)	2017		2016		2017		2016
Engineering and Other Scientific	$	70,670	$	61,237	$	207,148	$	187,026
Environmental and Health		16,885		16,375		52,369		51,037
Total revenues	$	87,555	$	77,612	$	259,517	$	238,063

Operating Income

	Three Months Ended				Nine Months Ended
	September 29,		September 30,		September 29,		September 30,
(In thousands)	2017		2016		2017		2016
Engineering and Other Scientific	$	23,645	$	19,933	$	70,279	$	60,632
Environmental and Health		5,450		4,758		16,753		13,981
Total segment operating income		29,095		24,691		87,032		74,613
Corporate operating expense		(9,790)		(9,096)		(32,776)		(27,651)
Total operating income	$	19,305	$	15,595	$	54,256	$	46,962

Capital Expenditures

	Three Months Ended				Nine Months Ended
	September 29,		September 30,		September 29,		September 30,
(In thousands)	2017		2016		2017		2016
Engineering and Other Scientific	$	662	$	902	$	2,464	$	3,365
Environmental and Health		64		33		170		94
Total segment capital expenditures		726		935		2,634		3,459
Corporate capital expenditures		102		8,746		720		9,604
Total capital expenditures	$	828	$	9,681	$	3,354	$	13,063

Depreciation and Amortization

	Three Months Ended				Nine Months Ended
	September 29,		September 30,		September 29,		September 30,
(In thousands)	2017		2016		2017		2016
Engineering and Other Scientific	$	1,103	$	1,136	$	3,381	$	3,273
Environmental and Health		47		45		132		133
Total segment depreciation and amortization		1,150		1,181		3,513		3,406
Corporate depreciation and amortization		417		401		1,249		1,103
Total depreciation and amortization	$	1,567	$	1,582	$	4,762	$	4,509