v3.26.1
Accounting Policies (Details - Segment reporting) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 27, 2026
Mar. 28, 2026
Jun. 28, 2025
Mar. 29, 2025
Jun. 27, 2026
Jun. 28, 2025
Dec. 27, 2025
Dec. 28, 2024
DisclosureLineitem [Line Items]                
Net sales $ 0   $ 0   $ 0 $ 0    
Cost of sales 0   0   0 0    
Selling, general and administrative expenses (656)   (811)   (1,490) (1,770)    
Revenues (4)   (3)   (7) (7)    
Interest income 238   630   546 1,237    
Interest expense 0   0   0 0    
Other, net 649   732   831 767    
Income tax expense 0   0   0 0    
Net loss in National Beef 227   548   (120) 227    
Equity in net loss of National Beef (5,474) $ (6,646) (5,290) $ (10,263) (12,120) (15,553)    
Net income (loss) (5,247)   (4,742)   (12,240) (15,326) $ (19,822) $ 7,514
Total assets 206,466   224,665   206,466 224,665    
Total liabilities (8,613)   (10,076)   (8,613) (10,076)    
Capital Expenditures for segment assets 0   0   0 0    
Reportable Subsegments [Member] | Equity Method Investment In National Beef Packing Company LLC And Subsidiaries [Member]                
DisclosureLineitem [Line Items]                
Revenues 3,748,080 [1]   3,263,256 [2]   7,239,258 [3] 6,529,485 [4]    
Cost of sales (3,714,652) [1]   (3,216,822) [2]   (7,187,919) [3] (6,466,796) [4]    
Selling, general and administrative expenses (14,179) [1]   (25,501) [2]   (22,293) [3] (56,139) [4]    
Revenues (45,050) [1]   (42,707) [2]   (88,958) [3] (84,399) [4]    
Interest income 5 [1]   7 [2]   74 [3] 18 [4]    
Interest expense (9,780) [1]   (12,855) [2]   (19,257) [3] (24,396) [4]    
Other, net 0 [1]   0 [2]   0 [3] 0 [4]    
Income tax expense (257) [1]   (522) [2]   (683) [3] (1,041) [4]    
Net loss in National Beef (35,318) [1]   (34,100) [2]   (78,411) [3] (101,186) [4]    
Equity in net loss of National Beef (5,474) [1]   (5,290) [2]   (12,120) [3] (15,553) [4]    
Total assets 2,265,105 [1]   2,327,690 [2]   2,265,105 [3] 2,327,690 [4]    
Total liabilities (1,189,632) [1]   (1,347,645) [2]   (1,189,632) [3] (1,347,645) [4]    
Capital Expenditures for segment assets (26,816) [1]   (20,680) [2]   (45,820) [3] (33,421) [4]    
Equity Method Investment In National Beef Packing Company LLC And Subsidiaries [Member] | Reportable Subsegments [Member]                
DisclosureLineitem [Line Items]                
Net sales 3,748,080   3,263,256   7,239,258 6,529,485    
Cost of sales (3,714,652)   (3,216,822)   (7,187,919) (6,466,796)    
Selling, general and administrative expenses (14,179)   (25,501)   (22,293) (56,139)    
Revenues (45,050)   (42,707)   (88,958) (84,399)    
Interest income 5   7   74 18    
Interest expense (9,780)   (12,855)   (19,257) (24,396)    
Other, net 0   0   0 0    
Income tax expense (257)   (522)   (683) (1,041)    
Net loss in National Beef (35,318)   (34,100)   (78,411) (101,186)    
Equity in net loss of National Beef (5,474)   (5,290)   (12,120) (15,553)    
Total assets 2,265,105   2,327,690   2,265,105 2,327,690    
Total liabilities (1,189,632)   (1,347,645)   (1,189,632) (1,347,645)    
Capital Expenditures for segment assets (26,816)   (20,680)   (45,820) (33,421)    
Elimination Of Unconsolidated Affiliate [Member] | Reportable Subsegments [Member]                
DisclosureLineitem [Line Items]                
Net sales (3,748,080)   (3,263,256)   (7,239,258) (6,529,485)    
Cost of sales 3,714,652   3,216,822   7,187,919 6,466,796    
Selling, general and administrative expenses 14,179   25,501   22,293 56,139    
Revenues 45,050   42,707   88,958 84,399    
Interest income (5)   (7)   (74) (18)    
Interest expense 9,780   12,855   19,257 24,396    
Other, net 0   0   0 0    
Income tax expense 257   522   683 1,041    
Net loss in National Beef 35,318   34,100   78,411 101,186    
Total assets (2,265,105)   (2,327,690)   (2,265,105) (2,327,690)    
Total liabilities 1,189,632   1,347,645   1,189,632 1,347,645    
Capital Expenditures for segment assets 26,816   20,680   45,820 33,421    
Corporate And Other Of USPB [Member] | Reportable Subsegments [Member]                
DisclosureLineitem [Line Items]                
Net sales 0   0   0 0    
Cost of sales 0   0   0 0    
Selling, general and administrative expenses (656)   (811)   (1,490) (1,770)    
Revenues (4)   (3)   (7) (7)    
Interest income 238   630   546 1,237    
Interest expense 0   0   0 0    
Other, net 649   732   831 767    
Income tax expense 0   0   0 0    
Net loss in National Beef 227   548   (120) 227    
Total assets 206,466   224,665   206,466 224,665    
Total liabilities (8,613)   (10,076)   (8,613) (10,076)    
Capital Expenditures for segment assets $ 0   $ 0   $ 0 $ 0    
[1] Amounts reflect those recorded in National Beef Packing Company, LLC and subsidiaries consolidated financial statements.
[2] Amounts reflect those recorded in National Beef Packing Company, LLC and subsidiaries consolidated financial statements.
[3] Amounts reflect those recorded in National Beef Packing Company, LLC and subsidiaries consolidated financial statements.
[4] Amounts reflect those recorded in National Beef Packing Company, LLC and subsidiaries consolidated financial statements.