Investments in Unconsolidated Affiliates - Summarized Financial Information Derived from Equity Method Investees' Consolidated Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 29, 2018
Balance sheet data [Abstract]
Current assets	$ 203,130		$ 203,130		$ 228,214
Noncurrent assets	103,975		103,975		114,257
Current liabilities	158,549		158,549		175,371
Noncurrent liabilities	59,631		59,631		$ 57,216
Income statement data [Abstract]
Net sales	120,062	$ 126,205	233,389	$ 250,305
Gross profit	15,327	11,749	23,333	23,849
Net (loss) income	$ (10,512)	$ 471	$ (39,719)	$ (17,860)

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