Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Income Statement [Abstract]
Net sales	$ 1,791,172	$ 1,366,334
Costs and expenses:
Cost of sales and operating expenses	1,366,973	1,020,577
Gain on sale of assets	(327)	(389)
Selling, general and administrative expenses	135,466	102,032
Restructuring and asset impairment charges	4,524	0
Acquisition and integration costs	7,022	3,773
Depreciation and amortization	116,006	79,246
Total costs and expenses	1,629,664	1,205,239
Equity in net income of Diamond Green Diesel	94,337	71,804
Operating income	255,845	232,899
Other expense:
Interest expense	(50,299)	(15,603)
Foreign currency gain/(loss)	5,004	(1,100)
Other income/(expense), net	6,159	(742)
Total other expense	(39,136)	(17,445)
Equity in net income of other unconsolidated subsidiaries	120	1,360
Income before income taxes	216,829	216,814
Income tax expense	26,974	26,083
Net income	189,855	190,731
Net income attributable to noncontrolling interests	(4,054)	(2,678)
Net income attributable to Darling	$ 185,801	$ 188,053
Basic income per share (in dollars per share)	$ 1.16	$ 1.17
Diluted income per share (in dollars per share)	$ 1.14	$ 1.14