Investments in Unconsolidated Affiliates - Summarized Financial Information Derived from Equity Method Investees' Consolidated Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018
Balance sheet data [Abstract]
Current assets	$ 200,129		$ 228,214
Noncurrent assets	107,349		114,257
Current liabilities	161,863		175,371
Noncurrent liabilities	62,814		$ 57,216
Income statement data [Abstract]
Net sales	113,327	$ 124,100
Gross profit	8,006	12,100
Net loss	$ (29,207)	$ (18,331)

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