Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Data

The following table shows selected quarterly data for the periods presented (in thousands):

	December 31,		September 27,		June 28,		March 29,
	2020		2020		2020		2020
Revenues	$	787,833	$	666,240	$	643,303	$	617,253
Costs of revenues	623,390		512,877		496,678		465,208
Operating income	20,482		28,532		34,295		7,457
Net (loss) income	$	(8,913)	$	10,731	$	16,786	$	(4,777)
	December 31,		September 29,		June 30,		March 31,
	2019		2019		2019		2019
Revenues	$	697,085	$	697,717	$	695,607	$	673,484
Costs of revenues	559,940		565,703		540,772		517,159
Operating (loss) income	(3,167)		(10,525)		26,158		14,353
Net (loss) income	$	(16,664)	$	(31,625)	$	3,388	$	(5,160)