Class of Stock [Axis] Class B Units [Member] Class A Units [Member] Equity Components [Axis] Members' Capital Legal Entity [Axis] National Beef Packing Company, LLC [Member] Property, Plant and Equipment, Type [Axis] Machinery and Equipment [Member] Furniture and Fixtures [Member] Trailers and Automotive Equipment [Member] Lender Name [Axis] CoBank [Member] Credit Facility [Axis] Revolving Credit Facility [Member] Plan Name [Axis] Management Phantom Unit Plan [Member] Award Type [Axis] Class A Phantom Units [Member] Class B Phantom Units [Member] Concentration Risk Benchmark [Axis] Cattle requirements [Member] Cash Incentive And Bonus Plans [Member] Property Subject to or Available for Operating Lease [Axis] Dodge City, KS Office Lease [Member] Kansas City, MO Office Lease [Member] Counterparty Name [Axis] Former CEO [Member] Additional Class A Phantom Units [Member] Certain Members of Management [Member] Additional Class B Phantom Units [Member] Statement [Table] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity a Well-known Seasoned Issuer Entity a Voluntary Filer Entity's Reporting Status Current Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Entity Public Float Entity Emerging Growth Entity Small Business Entity Shell Company Entity Interactive Data Current Entity File Number Entity Incorporation, State Country Code Statement of Financial Position [Abstract] Assets Current assets: Cash and cash equivalents Accounts receivable Due from affiliates Other current assets Total current assets Property, plant, and equipment, at cost Less accumulated depreciation Net property, plant, and equipment Right of use assets, net Investment in National Beef Packing Company, LLC Other assets Total assets Liabilities and Members' Capital Current liabilities: Accounts payable - trade Due to affiliates Accrued compensation and benefits Lease obligations Other accrued expenses and liabilities Distributions payable Total current liabilities Long-term liabilities: Lease obligations Other liabilities Total long-term liabilities Total liabilities Commitments and contingencies Members' capital Members' contributed capital, 735,385 Class A units and 755,385 Class B units authorized, issued and outstanding Total members' capital Total liabilities and members' capital Members' capital, units authorized Members' capital, units issued Members' capital, units outstanding Net sales Costs and expenses: Cost of sales Selling, general, and administrative expenses Depreciation and amortization Total costs and expenses Operating loss Other income : Interest income Interest expense Equity in income of National Beef Packing Company, LLC Other, net Total other income Net income Income per unit: Basic and diluted Outstanding weighted-average Class A and Class B units: Basic and diluted Beginning Balance Net income for the year Member distributions Ending Balance Statement of Cash Flows [Abstract] Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Equity in net income of National Beef Packing Company, LLC Distributions from National Beef Packing Company, LLC Changes in assets and liabilities: Accounts Receivable Due from affiliates Other assets Accounts payable Due to affiliates Accrued compensation and benefits Other accrued expenses and liabilities Net cash provided by investing activities Cash flows from investing activities: Capital expenditures, including interest capitalized Distributions from National Beef Packing Company, LLC Net cash (used in) provided by investing activities Cash flows from financing activities: Member distributions Net cash used in financing activities Net decrease in cash Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental cash disclosures: Cash paid during the period for interest Supplemental noncash disclosures of operating activities: Right of use assets and lease obligations Supplemental Noncash Disclosures Of Investing Activities: Required contribution of purchased ownership interest to National Beef Packing Company, LLC Supplemental noncash disclosures of financing activities: Distributions payable Accounting Policies [Abstract] Description of Business Basis of Presentation and Accounting Policies Debt Disclosure [Abstract] Long-Term Debt and Loan Agreements Share-based Payment Arrangement [Abstract] Employee Options and Benefit Plans Other Income and Expenses [Abstract] Other Income Income Tax Disclosure [Abstract] Income Taxes Related Party Transactions [Abstract] Related Party Transactions Commitments and Contingencies Disclosure [Abstract] Legal Proceedings Quarterly Financial Information Disclosure [Abstract] Quarterly Results (Unaudited) Subsequent Events [Abstract] Subsequent Events Basis of Presentation Fiscal Year Use of Estimates Cash and Cash Equivalents Investment in National Beef Packing Company, LLC Property, Plant and Equipment Distributions Payable Income Taxes Selling, General and Administrative Noncompetition Payments Business Segments Earnings Per Unit Schedule of changes to USPB’s investment in NBP Schedule of Property Plant And Equipment Estimated Useful Life Schedule of cost and accumulated depreciation for property, plant, and equipment Summary of current and long-term portions of accrued non-compete amounts Schedule of Income Per Unit Calculation Schedule of selected quarterly financial data for fiscal years Equity method percentage owned Beginning Investment Balance Purchase of ownership interest Equity in net income Distributions Ending Investment Balance Property and equipment useful lives Property, plant and equipment, gross Accumulated depreciation Property, plant and equipment, net Current non-compete Long-term non-compete Total non-compete Basic and diluted earnings per unit: Income attributable to USPB available to unitholders (numerator) Weighted average outstanding units (denominator) Per unit amount Equity method impairment Depreciation expense State taxes payable Payments for noncompetition agreement Noncompetition payment payable year one Noncompetition payment payable year two Accrued Noncompetition Payments Credit line maximum borrowing capacity Credit line, remaining borrowing capacity Credit line expiration date Credit line interest terms Remaining operating lease payments Remaining term of lease Lease periodic term Lease periodic payment Share-based compensation expense Accrued liabilities Phantom units outstanding 401K plan expenses Other non-operating income Income tax expense Concentration percentage Accounts receivable from unitholders Accounts payables to unitholders Net Sales Operating Loss Net Income (Loss) Basic and Diluted Earnings Per Unit Class A Units [Member] Class B Units [Member] Distributions payable Distributions payable Distributions payable [Policy Text Block] Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the noncurrent portion of the liabilities due after one year (or the normal operating cycle, if longer). National Beef Packing Company, LLC [Member] Post employment payments provided for in former CEO';s employment agreements [Policy Text Block] Schedule of useful lives of property and equipment [Table Text Block] Lease periodic term Lease periodic payment Summary of current and long-term portions of accrued non-compete amounts [Table Text Block] Supplemental noncash disclosures of operating activities: [Abstract] Supplemental noncash disclosures of investing activities: [Abstract] Required contribution of purchased ownership interest to National Beef Packing Company, LLC Current portion of gross carrying amount before accumulated amortization as of the balance sheet date of payments made to third parties in exchange for their agreement not to engage in specified competitive practices in specified geographic territories for a specified period of time. Noncurrent portion of gross carrying amount before accumulated amortization as of the balance sheet date of payments made to third parties in exchange for their agreement not to engage in specified competitive practices in specified geographic territories for a specified period of time. Member distributions Distributions Income tax expense Accounts receivable from unitholders Accounts payables to unitholders Assets, Current Assets [Default Label] Liabilities, Current Operating Lease, Liability, Noncurrent Liabilities, Noncurrent Liabilities Members' Equity Liabilities and Equity Costs and Expenses Interest Expense Other Operating Income (Expense), Net Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid Increase (Decrease) in Accounts Receivable Increase (Decrease) in Due from Affiliates, Current Increase (Decrease) in Prepaid Expense and Other Assets Increase (Decrease) in Due to Affiliates, Current Increase (Decrease) in Employee Related Liabilities Increase (Decrease) in Other Accrued Liabilities Net Cash Provided by (Used in) Operating Activities Payments to Acquire Property, Plant, and Equipment Proceeds from Equity Method Investment, Distribution, Return of Capital Net Cash Provided by (Used in) Investing Activities MemberDistributions Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) DocumentAndEntityInformationAbstract Equity and Cost Method Investments, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] EquityMethodInvestmentDividendsOrDistributions1 Finite-Lived Noncompete Agreements, Gross