Reportable Segments (Tables)

6 Months Ended

Jun. 28, 2019

Segment Reporting [Abstract]

Summary of Segment Description and Data

The following table describes each segment:

Segment	Product or Services	Markets Served	Geographic Areas
SPS	Assembly Weldments Machining Fabrication	Semiconductor	United States Asia Europe
SSB	Cleaning Analytics	Semiconductor	United States Asia Europe

	Three Months Ended				Six Months Ended
	June 28,		June 29,		June 28,		June 29,
	2019		2018		2019		2018
Revenues:
SPS	$	210,390	$	290,213	$	410,635	$	605,055
SSB		54,977		—		114,873		—
Total segment revenues	$	265,367	$	290,213	$	525,508	$	605,055
Gross profit:
SPS	$	29,317	$	46,065	$	54,998	$	94,869
SSB		18,852		—		37,968		—
Total segment gross profit	$	48,169	$	46,065	$	92,966	$	94,869
Operating profit:
SPS	$	6,368	$	22,664	$	10,692	$	49,572
SSB		2,603		—		6,459		—
Total segment operating profit	$	8,971	$	22,664	$	17,151	$	49,572
					June 28,		December 28,
					2019		2018
Assets
SPS					$	819,970	$	802,715
SSB						188,988		162,762
Total segment assets					$	1,008,958	$	965,477