Investment in Unconsolidated Affiliates - Summarized Financial Information Derived from Equity Method Investees' Consolidated Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Balance sheet data [Abstract]
Current assets	$ 230,289		$ 246,127
Noncurrent assets	128,200		139,200
Current liabilities	164,309		174,710
Noncurrent liabilities	61,183		$ 58,334
Income statement data [Abstract]
Net sales	124,100	$ 126,300
Gross profit	12,100	15,600
Net loss	$ (18,331)	$ (2,487)