Investment in Unconsolidated Subsidiary (Revenues and Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 28, 2024	Jun. 29, 2024	Mar. 30, 2024	Sep. 30, 2023	Jul. 01, 2023	Apr. 01, 2023	Sep. 28, 2024	Sep. 30, 2023
Revenues:
Operating revenues	$ 1,421,891			$ 1,625,204			$ 4,297,482	$ 5,173,997
Expenses:
Cost of sales and operating expenses (excludes depreciation and amortization, shown separately below)	1,108,319			1,238,733			3,353,406	3,965,408
Total costs and expenses	1,364,214			1,501,224			4,076,750	4,744,789
Operating income	60,107			178,369			345,778	790,898
Income before income taxes	1,644			112,717			169,278	625,455
Income tax expense/(benefit)	(17,471)			(15,364)			(12,790)	52,322
Net income	19,115	$ 81,365	$ 81,588	128,081	$ 255,197	$ 189,855	182,068	573,133
Diamond Green Diesel Holdings LLC Joint Venture
Revenues:
Operating revenues	1,224,679			1,430,666			3,819,870	5,356,827
Expenses:
Cost of sales and operating expenses (excludes depreciation and amortization, shown separately below)	1,126,200			1,257,766			3,300,483	4,430,485
Lower of cost or market (LCM) inventory valuation adjustment	20,310			0			57,814	0
Depreciation, amortization and accretion expense	68,303			55,118			195,503	172,040
Total costs and expenses	1,214,813			1,312,884			3,553,800	4,602,525
Operating income	9,866			117,782			266,070	754,302
Other income	5,058			2,701			14,336	6,863
Interest and debt expense, net	(10,093)			(11,705)			(30,372)	(37,785)
Income before income taxes	4,831			108,778			250,034	723,380
Income tax expense/(benefit)	(29)			0			(58)	0
Net income	$ 4,860			$ 108,778			$ 250,092	$ 723,380