Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2023

Segment Reporting [Abstract]

Segment Reporting Information, by Segment

Segment information for the three and six months ended June 30, 2023 and July 1, 2022 follows:

Revenues

	Three Months Ended				Six Months Ended
(In thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Engineering and Other Scientific	$	116,647	$	109,150	$	233,695	$	213,765
Environmental and Health		23,574		21,131		46,835		44,994
Total revenues	$	140,221	$	130,281	$	280,530	$	258,759

Operating Income

	Three Months Ended						Six Months Ended
(In thousands)	June 30, 2023			July 1, 2022			June 30, 2023			July 1, 2022
Engineering and Other Scientific	$	38,711		$	40,032		$	82,330		$	78,522
Environmental and Health		7,521			6,846			15,075			14,681
Total segment operating income		46,232			46,878			97,405			93,203
Corporate operating expense		(16,357	)		(1,601	)		(38,410	)		(11,209	)
Total operating income	$	29,875		$	45,277		$	58,995		$	81,994

Certain operating expenses are excluded from the Company’s measure of segment operating income. These expenses include costs associated with its human resources, finance, information technology, and business development groups; the deferred compensation expense/benefit due to the change in value of assets associated with its deferred compensation plan; stock-based compensation associated with restricted stock unit and stock option awards; and the change in its allowance for contract losses and doubtful accounts.

Capital Expenditures

	Three Months Ended				Six Months Ended
(In thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Engineering and Other Scientific	$	1,261	$	1,616	$	2,669	$	2,180
Environmental and Health		19		6		114		56
Total segment capital expenditures		1,280		1,622		2,783		2,236
Corporate capital expenditures		8,287		3,034		12,645		5,215
Total capital expenditures	$	9,567	$	4,656	$	15,428	$	7,451

Certain capital expenditures associated with the Company’s corporate cost centers and the related depreciation are excluded from the Company’s segment information.

Depreciation and Amortization

	Three Months Ended				Six Months Ended
(In thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Engineering and Other Scientific	$	1,372	$	1,154	$	2,678	$	2,193
Environmental and Health		54		41		102		83
Total segment depreciation and    amortization		1,426		1,195		2,780		2,276
Corporate depreciation and amortization		760		617		1,394		1,225
Total depreciation and amortization	$	2,186	$	1,812	$	4,174	$	3,501