Segment Reporting (Tables)

6 Months Ended

Jun. 28, 2020

Segment Reporting [Abstract]

Information by Reportable Segment

The following table shows information by reportable segment for the periods presented (in thousands):

	Three Months Ended				Six Months Ended
	June 28,		June 30,		June 28,		June 30,
	2020		2019		2020		2019
Revenues
GMS	$	507,854	$	526,025	$	965,298	$	1,030,504
NSS	135,449		169,582		295,258		338,587
Corporate	—		—		—		—
Total revenues	$	643,303	$	695,607	$	1,260,556	$	1,369,091
Operating income
GMS	$	31,537	$	25,276	$	44,140	$	51,067
NSS	7,725		3,974		12,092		3,187
Corporate	(4,967)		(3,091)		(14,479)		(13,743)
Total operating income	$	34,295	$	26,159	$	41,753	$	40,511
Amortization of intangible assets
GMS	$	4,115	$	4,140	$	8,231	$	8,399
NSS	3,932		4,056		7,863		8,454
Corporate	—		—		—		—
Total amortization of intangible assets	$	8,047	$	8,196	$	16,094	$	16,853