Segment Reporting (Tables)

3 Months Ended

Mar. 30, 2018

Segment Reporting [Abstract]

Segment Reporting Information, by Segment

Segment information for the three months ended March 30, 2018 and March 31, 2017 follows:

Revenues
	Three Months Ended
(In thousands)	March 30, 2018		March 31, 2017
Engineering and Other Scientific	$	77,047	$	66,683
Environmental and Health		19,410		17,439
Total revenues	$	96,457	$	84,122

Operating Income
	Three Months Ended
(In thousands)	March 30, 2018		March 31, 2017
Engineering and Other Scientific	$	25,913	$	22,321
Environmental and Health		6,624		5,479
Total segment operating income		32,537		27,800
Corporate operating expense		(10,939)		(13,166)
Total operating income	$	21,598	$	14,634

Capital Expenditures
	Three Months Ended
(In thousands)	March 30, 2018		March 31, 2017
Engineering and Other Scientific	$	813	$	1,008
Environmental and Health		51		42
Total segment capital expenditures		864		1,050
Corporate capital expenditures		5,946		257
Total capital expenditures	$	6,810	$	1,307

Depreciation and Amortization
	Three Months Ended
(In thousands)	March 30, 2018		March 31, 2017
Engineering and Other Scientific	$	1,095	$	1,115
Environmental and Health		39		41
Total segment depreciation and amortization		1,134		1,156
Corporate depreciation and amortization		421		410
Total depreciation and amortization	$	1,555	$	1,566