Segment Reporting (Tables)

6 Months Ended

Jun. 28, 2019

Segment Reporting [Abstract]

Segment Reporting Information, by Segment

Segment information for the three and six months ended June 28, 2019 and June 29, 2018 follows:

Revenues

	Three Months Ended				Six Months Ended
(In thousands)	June 28, 2019		June 29, 2018		June 28, 2019		June 29, 2018
Engineering and Other Scientific	$	86,820	$	77,080	$	167,074	$	154,127
Environmental and Health		19,686		18,541		38,463		37,951
Total revenues	$	106,506	$	95,621	$	205,537	$	192,078

Operating Income

	Three Months Ended						Six Months Ended
(In thousands)	June 28, 2019			June 29, 2018			June 28, 2019			June 29, 2018
Engineering and Other Scientific	$	29,252		$	25,802		$	55,226		$	51,715
Environmental and Health		7,039			6,156			13,235			12,780
Total segment operating income		36,291			31,958			68,461			64,495
Corporate operating expense		(11,468	)		(9,480	)		(27,884	)		(20,419	)
Total operating income	$	24,823		$	22,478		$	40,577		$	44,076

Capital Expenditures

	Three Months Ended				Six Months Ended
(In thousands)	June 28, 2019		June 29, 2018		June 28, 2019		June 29, 2018
Engineering and Other Scientific	$	929	$	1,291	$	2,707	$	2,104
Environmental and Health		13		47		56		98
Total segment capital expenditures		942		1,338		2,763		2,202
Corporate capital expenditures		5,958		801		10,478		6,747
Total capital expenditures	$	6,900	$	2,139	$	13,241	$	8,949

Depreciation and Amortization

	Three Months Ended				Six Months Ended
(In thousands)	June 28, 2019		June 29, 2018		June 28, 2019		June 29, 2018
Engineering and Other Scientific	$	1,170	$	1,121	$	2,291	$	2,216
Environmental and Health		48		41		93		80
Total segment depreciation and amortization		1,218		1,162		2,384		2,296
Corporate depreciation and amortization		424		432		848		853
Total depreciation and amortization	$	1,642	$	1,594	$	3,232	$	3,149