Segment Reporting (Tables)

6 Months Ended

Jun. 29, 2018

Segment Reporting [Abstract]

Segment Reporting Information, by Segment

Segment information for the three and six months ended June 29, 2018 and July 30, 2017 follows:

Revenues
	Three Months Ended				Six Months Ended
(In thousands)	June 29, 2018		June 30, 2017		June 29, 2018		June 30, 2017
Engineering and Other Scientific	$	77,080	$	69,795	$	154,127	$	136,478
Environmental and Health		18,541		18,045		37,951		35,484
Total revenues	$	95,621	$	87,840	$	192,078	$	171,962

Operating Income
	Three Months Ended				Six Months Ended
(In thousands)	June 29, 2018		June 30, 2017		June 29, 2018		June 30, 2017
Engineering and Other Scientific	$	25,802	$	24,313	$	51,715	$	46,634
Environmental and Health		6,156		5,824		12,780		11,303
Total segment operating income		31,958		30,137		64,495		57,937
Corporate operating expense		(9,480)		(9,820)		(20,419)		(22,986)
Total operating income	$	22,478	$	20,317	$	44,076	$	34,951

Capital Expenditures
	Three Months Ended				Six Months Ended
(In thousands)	June 29, 2018		June 30, 2017		June 29, 2018		June 30, 2017
Engineering and Other Scientific	$	1,291	$	794	$	2,104	$	1,802
Environmental and Health		47		64		98		106
Total segment capital expenditures		1,338		858		2,202		1,908
Corporate capital expenditures		801		361		6,747		618
Total capital expenditures	$	2,139	$	1,219	$	8,949	$	2,526

Depreciation and Amortization
	Three Months Ended				Six Months Ended
(In thousands)	June 29, 2018		June 30, 2017		June 29, 2018		June 30, 2017
Engineering and Other Scientific	$	1,121	$	1,163	$	2,216	$	2,278
Environmental and Health		41		44		80		85
Total segment depreciation and amortization		1,162		1,207		2,296		2,363
Corporate depreciation and amortization		432		422		853		832
Total depreciation and amortization	$	1,594	$	1,629	$	3,149	$	3,195