Earnings Per Unit (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Schedule of Reconciliation of earnings per unit

Income Per Unit Calculation	14 weeks ended		13 weeks ended		39 weeks ended
(thousands of dollars, except unit and per unit data)	September 30, 2023		September 24, 2022		September 30, 2023		September 24, 2022
	(unaudited)		(unaudited)		(unaudited)		(unaudited)
Basic and diluted earnings per unit:
Income attributable to USPB available to unitholders (numerator)
Class A	$	1,495	$	4,312	$	3,691	$	15,489
Class B	$	13,459	$	38,812	$	33,214	$	139,396
Weighted average outstanding units (denominator)
Class A		735,385		735,385		735,385		735,385
Class B		755,385		755,385		755,385		755,385
Per unit amount
Class A	$	2.03	$	5.86	$	5.02	$	21.06
Class B	$	17.82	$	51.38	$	43.97	$	184.54