Restructuring and Other Charges - Narrative (Details) $ in Thousands			3 Months Ended				12 Months Ended
	Dec. 23, 2019 USD ($) office	Dec. 29, 2018 USD ($) Employee	Apr. 05, 2020 USD ($)	Dec. 29, 2019 USD ($)	Sep. 29, 2019 USD ($)	Dec. 30, 2018 USD ($)	Jan. 03, 2021 USD ($)	Dec. 29, 2019 USD ($)	Dec. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring, asset impairment and other charges							$ (4,600)	$ 12,900	$ 20,500
Restructuring reserve				$ 11,445		$ 11,907	1,064	11,445	11,907	$ 0
Other write-off	$ 5,000
Restructuring charges			$ (1,100)
Restructuring and asset impairment charges				12,300	$ 700
2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated | Employee		200
Restructuring and asset impairment charges						20,500
Asset impairment charges		$ 8,600				8,600
Future cash expenditures for restructuring		12,000
Adjustment to previously recorded severance expense							(900)
2018 Restructuring Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				1,898		10,763	0	1,898	10,763	0
Restructuring charges						10,800
Future cash expenditures for restructuring		$ 10,800
Adjustment to previously recorded severance expense				(1,700)
2018 Restructuring Plan | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				774		1,144	0	774	1,144	0
Restructuring charges					$ (700)	1,100
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve							1,100
Number of employees eliminated	105
Number of offices | office	2
Restructuring charges				9,000
Future cash expenditures for restructuring							9,000
Restructuring, expected savings							6,000
2019 Restructuring Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				8,634		0	1,064	8,634	0	0
Restructuring charges				8,800
Adjustment to previously recorded severance expense							(3,700)
2019 Restructuring Plan | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				139		$ 0	$ 0	$ 139	$ 0	$ 0
Restructuring charges				$ 200