Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended
	Oct. 30, 2019	Dec. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charges		$ 4,200	$ 200	$ 2,800	$ 322	$ 2,218	$ 0
Investments in equity securities		12,969			12,969	10,312
Notional value		16,000			16,000
Cash Equivalents		118,999			118,999
Mutual funds		10,464			10,464	9,112
Other Expense
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charges					7,300
Investments in equity securities		400			400
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in equity securities		12,969			12,969	10,312
Cash Equivalents		118,999			118,999
Mutual funds		10,464			10,464	9,112
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in equity securities		0			0	0
Cash Equivalents		0			0
Mutual funds		0			0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in equity securities		0			0	0
Cash Equivalents		0			0
Mutual funds		$ 0			$ 0	$ 0
Foreign Exchange Forward | Other Income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on change in fair value of foreign currency exchange forward contract	$ 200
Accrued Liabilities | Foreign Exchange Forward
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on change in fair value of foreign currency exchange forward contract	$ 200