Document and Entity Information [Abstract] Document and Entity Information [Abstract] Statement [Table] Statement [Table] Class Of Stock [Axis] Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] Class Units Member Class A units Represents class A of limited liability company account. Class B Units Member Class B units Represents class B of limited liability company account. Statement [Line Items] Statement [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Well-Known Seasoned Issuer Entity Well-known Seasoned Issuer Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Statement Of Financial Position [Abstract] Statement of Financial Position [Abstract] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, At Carrying Value Cash and cash equivalents Cash and cash equivalents Cash and cash equivalents at beginning of the period Cash and cash equivalents at end of the period Accounts Receivable, Net, Current Accounts receivable, less allowance for returns and doubtful accounts of $0, $0, and $3,368, respectively Due From Affiliate, Current Due from affiliates Other Receivables Other receivables Inventory, Net Inventories Total Inventory Other Assets, Current Other current assets Assets, Current Total current assets Total current assets Property, Plant and Equipment, Gross Property, plant, and equipment, at cost Total property, plant, and equipment, at cost Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Less accumulated depreciation Property, Plant and Equipment, Net Property, plant, and equipment, net Net property, plant, and equipment Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Goodwill Goodwill Beginning balance Ending balance Intangible Assets, Net (Excluding Goodwill) Other intangible assets, net of accumulated amortization of $0, $0, and $18,230, respectively Investments In and Advance To Affiliates, Subsidiaries, Associates, and Joint Ventures Investment in National Beef Packing Company, LLC Investments in National Beef Packing Company, LLC Restricted Cash and Cash Equivalents, Noncurrent Restricted cash Other Assets, Noncurrent Other assets Other Assets, Noncurrent, Total Assets Total assets Total assets Liabilities and Equity [Abstract] Liabilities and Capital Shares and Equities Liabilities, Current [Abstract] Current liabilities: Debt, Current Current installments of long-term debt Cattle Purchases Payable Cattle purchases payable Represents total of cattle purchases payable. Accounts Payable, Trade, Current Accounts payable - trade Due To Affiliate, Current Due to affiliates Employee-Related Liabilities, Current Accrued compensation and benefits Employee-related Liabilities, Current, Total Accrued Insurance, Current Accrued insurance Other Accrued Liabilities, Current Other accrued expenses and liabilities Patronage Notice Payable In Cash Patronage notices payable Total of patronage notice payable in cash. Distributions Payable Distributions payable Total amount of distributions payable. Liabilities, Current Total current liabilities Total current liabilities Liabilities, Noncurrent [Abstract] Long-term liabilities: Long-Term Debt and Capital Lease Obligations Long-term debt, excluding current installments Long term debt and capital lease obligation, total Other Liabilities, Noncurrent Other liabilities Liabilities, Noncurrent Total long-term liabilities Liabilities, Noncurrent Liabilities Total liabilities Total liabilities Capital Subject To Redemption Non-controlling interest in NBP Non-controlling interest in National Beef Packing Company, LLC Non-controlling interest in NBP Represents non-controlling interest in subsidiary, capital subject to redemption. Commitments and Contingencies Commitments and contingencies Stockholders Equity, Including Portion Attributable To Noncontrolling Interest [Abstract] Capital shares and equities: Members Capital Members' capital, 735,385 , 755,385 authorized, issued and outstanding Member's capital Balance at December 31, 2011 Balance at September 29, 2012 The amount of ownership interest of different classes of members in the limited liability company. Patronage Notices Patronage notices Represents the amount of the patronage notices. Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net Of Tax Accumulated other comprehensive income Members Capital and Patronage Notices Total capital shares and equities attributable to USPB Total capital shares and equities attributable to USPB Represents total of all capital shares and equities (deficit) items, which are attributable to the parent. Excludes the amount of capital shares and equities which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Non Controlling Interest In Subsidiary Non-controlling interest in Kansas City Steak Company, LLC represents total of all capital shares and equities which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). Capital Shares and Equities Total capital shares and equities Balance Balance Represents total of all capital shares and equities (deficit) items, which are attributable to the parent and noncontrolling interests. This excludes temporary equity and is sometimes called permanent equity. Capital Shares and Equities Liabilities and Capital Shares and Equities Total liabilities and capital shares and equities Total liabilities, non-controlling interest in NBP and capital shares and equities Total of all Liabilities and Capital Shares and Equities items, including the portion of equity attributable to noncontrolling interests. Allowance For Doubtful Accounts Receivable, Current Allowance for returns and doubtful accounts (in dollars) Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Accumulated amortization (in dollars) Limited Liability Company Capital Account Units Authorized Members Capital, units authorized The number of limited liability company units authorized to be issued. Limited Liability Company Capital Account Units Issued Number of convertible securities available for transfer Members Capital, units issued Number of units issued The number of limited liability company units issued. Limited Liability Company Capital Account Units Outstanding Members Capital, units outstanding The number of limited liability company units outstanding. Income Statement [Abstract] Income Statement [Abstract] Net Sales Net sales Net sales Costs and Expenses Costs and expenses: Cost Of Sales Cost of sales Cost of sales Selling, General, and Administrative Expenses Selling, general, and administrative expenses Selling, general, and administrative expenses Depreciation and Amortization Depreciation and amortization Depreciation and amortization Total Costs and Expenses Total costs and expenses Total costs and expenses Operating (Loss) Income Operating income Operating (loss) income Operating (Loss) Income Other Income (Expense) Other income (expense): Interest Income Interest income Interest income Interest Expense Interest expense Interest expense Interest expense Equity Interest In Net Income Of Subsidiary Equity in earnings of National Beef Packing Company, LLC This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Equity in earnings of National Beef Equity interest in net loss of National Beef Packing Company, LLC Deconsolidation, Gain (Loss), Amount Gain on sale of majority interest in National Beef Packing Co., LLC Gain on the deconsolidation and sale of subsidiary Gain on sale of majority interest in National Beef Packing Co., LLC Gain on deconsolidation and sale of majority of ownership Other, Net Other, net Other, net Other, net Nonoperating Income (Expense) Total other income (expense) Nonoperating Income (Expense) Income Before Taxes Allocation of net income for the thirty-nine week period ended September 29, 2012 Income before taxes Income before taxes Income Tax Expense Income tax expense Income tax expense Net Income (Loss) Net income Allocation of net income for the year Net income Net Income Less Net Income Attributable To Noncontrolling Interest In Less: Net income attributable to non-controlling interest in: Net Income (Loss) Attributable To Noncontrolling Interest One Less: net income (loss) attributable to Kansas City Steak Company, LLC Kansas City Steak Company, LLC The portion of net Income or Loss attributable to the noncontrolling interest in subsidiary. Less: net income (loss) attributable to Kansas City Steak Company, LLC Net Income (Loss) Attributable To Noncontrolling Interest Two National Beef Packing Company, LLC Net income attributable to NBP The portion of net Income or Loss attributable to the noncontrolling interest in subsidiary. Net (loss) income attributable to NBP Net Income Attributable To U.S. Premium Beef, Llc Net (Loss) Income Attributable to USPB Allocation of net income for the year Net income attributable to U.S. Premium Beef, LLC Earnings Per Unit Earnings per unit: Earnings Per Limited Liability Company Unit [Abstract] Basic (Loss) Earnings Per Basic Per unit amount Net Income Loss Per Outstanding Limited Liability Company Class Unit Basic Class A units (in dollars per unit) Net income (loss) allocated to each outstanding limited liability company Class A unit. Class A Unit (in dollars per unit) Net Income Loss Per Outstanding Limited Liability Company Class B Unit Basic Class B units (in dollars per unit) Net income (loss) allocated to each outstanding limited liability company Class B unit. Class B Unit (in dollars per unit) Net Income Loss Per Outstanding Limited Liability Company Unit Diluted [Abstract] Diluted Earnings Per Diluted Per unit amount Net Income Loss Per Outstanding Limited Liability Company Class Unit Diluted Class A Units (in dollars per unit) Net income or loss allocated to each limited liability company unit outstanding during the reporting period and Class A unit that would have been outstanding assuming the issuance of limited liability company units for all dilutive potential units outstanding during the reporting period. Class A Unit (in dollars per unit) Class A units (in dollars per unit) Net Income Loss Per Outstanding Limited Liability Company Class B Unit Diluted Class B Units (in dollars per unit) Net income or loss allocated to each limited liability company unit outstanding during the reporting period and Class B unit that would have been outstanding assuming the issuance of limited liability company units for all dilutive potential units outstanding during the reporting period. Class B Unit (in dollars per unit) Class B units (in dollars per unit) Weighted Average Number Of Units Outstanding [Abstract] Outstanding weighted-average Class A and Class B units: Weighted Average Number Of Units Outstanding Basic [Abstract] Basic Weighted average outstanding units (denominator) Weighted Average Limited Liability Company Class Units Outstanding Basic Weighted average outstanding Class A units Class A units (in unit) The average number of limited liability company Class A units issued and outstanding that are used in calculating basic earnings per unit. Weighted average outstanding Class A units (in units) Weighted Average Limited Liability Company Class B Units Outstanding Basic Weighted average outstanding Class B units Class B units (in unit) The average number of limited liability company Class B units issued and outstanding that are used in calculating basic earnings per unit. Weighted average outstanding Class B units (in units) Weighted Average Number Of Units Outstanding Diluted [Abstract] Diluted Weighted Average Limited Liability Company Class Units Outstanding Diluted Class A units (in unit) Units (denominator) - Class A units The average number of limited liability Class A company units issued and outstanding that are used in calculating diluted earnings per unit. Weighted Average Limited Liability Company Class B Units Outstanding Diluted Class B units (in unit) Units (denominator) - Class B units The average number of limited liability Class B company units issued and outstanding that are used in calculating diluted earnings per unit. Statement Of Income and Comprehensive Income [Abstract] Statement of Income and Comprehensive Income [Abstract] Other Comprehensive Income (Loss), Net Of Tax [Abstract] Other comprehensive income (expense): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net Of Tax Foreign currency translation adjustments Foreign currency translation adjustment Comprehensive Income (Loss), Net Of Tax, Including Portion Attributable To Noncontrolling Interest Comprehensive income Comprehensive income Comprehensive Income (Loss), Net Of Tax, Attributable To Noncontrolling Interest [Abstract] Comprehensive income attributable to non-controlling interest in: Comprehensive Income (Loss), Net Of Tax, Attributable To Parent Comprehensive income attributable to USPB Comprehensive income attributable to USPB Statement Of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Members Capital [Member] Members' capital Represents the ownership interest of different classes of members in the limited liability company. Patronage Notices [Member] Patronage notices Patronage Notices were redeemed in full as a result of USPB's sale of a majority of its ownership interest in NBP to LUK Patronage Notices do not constitute units or membership interests in the Company, and holders will not be unitholders or associates of the Company by virtue of holding Patronage Notices. As was the case in the cooperative, Patronage Notices will be paid by the Company at such time and in such amounts as may be determined by the board of directors in its sole and absolute discretion. Upon liquidation, holders of Patronage Notices will be paid before holders of Class A and Class B interests. Patronage Notices carry no other or additional rights. Accumulated Other Comprehensive Income (Loss) [Member] Accumulated other comprehensive (loss) income Non Controlling Interest In Subsidiary [Member] Non-controlling interest in Kansas City Steak Company, LLC This element represents capital shares and equities which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). Equity Component [Domain] Equity Component [Domain] Increase (Decrease) In Stockholders' Equity [Roll Forward] Members Capital [Roll Forward] Adjustment To Reflect Prior Period Corrections Adjustment to reflect prior period corrections Represents adjustment to reflect prior period corrections. Allocation Of Net Income Allocation of net income for the year Represents allocation of net income. Adjustment To Fair Value Of Non Controlling Interest Adjustment to fair value of non-controlling interest Represents accumulated fair value adjustments to minority owners interest. Adjustment to fair value of non-controlling interest Distributions To Non Controlling Interest In Subsidiary Distributions to non-controlling interest in Kansas City Steak Company, LLC Represents adjustment that results from distributions to non-controlling interest in subsidiary. Redemption Of Patronage Notices Redemption of patronage notices Represents adjustment that results from redemption of patronage notices. Limited Liability Account Distributions Total Partner distributions Represents total distributions to each class of limited liability (i.e., general, limited liability). Partner distributions Statement Of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Net Cash Provided By (Used In) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Adjustments To Reconcile Net Income (Loss) To Cash Provided By (Used In) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Distribution From Member Or Limited Partner, Cash Distribution Distribution from National Beef The amount of cash distributions received from a common shareholder or unit-holder by a LLC or LP. Gain (Loss) On Sale Of Property Plant Equipment Gain on disposal of property, plant, and equipment Gain on sale of fixed assets Equity in earnings of National Beef Packing Company, LLC Gain on disposal of property, plant, and equipment Amortization Of Financing Costs Amortization of financing charges Amortization of debt issuance costs Write Off Of Deferred Debt Issuance Cost Write-off of debt issuance costs Increase (Decrease) In Operating Capital [Abstract] Changes in assets and liabilities (net of acquisition): Increase (Decrease) In Accounts Receivable Accounts receivable Accounts receivable Increase (Decrease) In Due From Affiliates, Current Due from affiliates Due from affiliates Increase (Decrease) In Other Receivables Other receivables Other receivables Increase (Decrease) In Inventories Inventories Inventories Inventories Increase (Decrease) In Prepaid Expense and Other Assets Other assets Other assets Other assets Increase Decrease In Cattle Purchases Payable Cattle purchases payable The increase (decrease) during the reporting period in cattle purchases payable. Increase (Decrease) In Accounts Payable Accounts payable Accounts payable Increase (Decrease) In Due To Affiliates, Current Due to affiliates Increase (Decrease) In Employee Related Liabilities Accrued compensation and benefits Accrued compensation and benefits Increase Decrease In Accrued Insurance Accrued insurance The increase (decrease) during the reporting period in accrued insurance. Increase (Decrease) In Other Accrued Liabilities Other accrued expenses and liabilities Net Cash Provided By Operating Activities Net cash provided by operating activities Net cash provided by operating activities Net Cash Provided By (Used In) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Payments To Acquire Property, Plant, and Equipment Capital expenditures, including interest capitalized Capital expenditures, including interest capitalized Capital expenditures, including interest capitalized Proceeds From Sale Of Majority Interest In Subsidiary Proceeds from sale of majority interest in National Beef Packing Co., LLC, net This is a cash inflow associated with the sale of a majority of the ownership interests of a subsidiary. Proceeds From Sale Of Property, Plant, and Equipment Proceeds from sale of property, plant, and equipment Proceeds from sale of property, plant, and equipment Net Cash Used In Investing Activities Net cash provided by (used in) investing activities Net cash provided by (used in) investing activities Net Cash Provided By (Used In) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Proceeds From (Repayments Of) Lines Of Credit Net (payments) receipts under revolving credit lines Proceeds from (Repayments of) Lines of Credit, Total Net receipts under revolving credit lines Proceeds From Notes Payable Borrowings under term note payable Borrowings of term notes payable Repayments Of Other Debt and Capital Lease Obligations Repayments of other indebtedness/capital leases The cash outflow during the period from the repayment of other debt and payment of capital lease obligations. Repayments of other indebtedness / capital leases Repayments Of Senior Debt Purchase and cancellation of Senior Notes Purchase and cancellation of Senior Notes Payment Of Patronage Notices Payments of patronage notices The cash outflow for patronage notices. Payments of patronage notices Payments Of Notes Payable and Fees Payments of notes payable and fees The cash outflow for a borrowing supported by a written promise and fees to pay an obligation. Payments of notes payable and fees Payments Of Financing Costs Cash paid for financing costs Cash paid for financing costs Change In Overdraft Balances Change in overdraft balances This is the net cash inflow or outflow associated with checks that have been issued, but have not yet cleared. Member Capital Redeemed Member capital redeemed Represents member capital redeemed. Member capital redeemed Distribution Made To Member Or Limited Partner, Cash Distributions Paid Distributions to non-controlling interests in National Beef Packing Company, LLC Distributions to non-controlling interests in National Beef Packing Company, LLC Payments Of Capital Distribution Partnership distributions and redemptions Partnership distributions and redemptions Net Cash Used In Financing Activities Net cash used in financing activities Net cash used in financing activities Effect Of Exchange Rate Changes On Cash Effect of exchange rate changes on cash Net (Decrease) Increase In Cash Net increase (decrease) in cash Net (decrease) increase in cash Supplemental Cash Flow Information [Abstract] Supplemental cash disclosures: Interest Paid Cash paid during the period for interest Income Taxes Paid, Net Cash paid during the period for taxes, net Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental noncash disclosures of investing and financing activities: Assets Acquired Through Capital Lease Assets acquired through capital lease Represents the amount of Assets acquired through capital lease. Description Of Business [Abstract] Description Of Business [Abstract] Nature Of Operations [Text Block] Description of Business Basis Of Presentation and Accounting Policies [Abstract] Basis Of Presentation and Accounting Policies [Abstract] Basis Of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation and Accounting Policies Prior Period Adjustment [Abstract] Prior Period Adjustment [Abstract] Accounting Changes and Error Corrections [Text Block] Immaterial Prior Period Error New Accounting Policies [Abstract] New Accounting Policies [Abstract] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] New Accounting Policies Divestiture Deconsolidation [Abstract] Divestiture Deconsolidation [Abstract] Divestiture Deconsolidation [Text Block] Divestiture, Deconsolidation The entire disclosure for the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries during the period. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Long-Term Debt and Loan Agreements Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Compensation and Employee Benefit Plans [Text Block] Employee Options and Benefit Plans Other Income and Expenses [Abstract] Other Income and Expenses [Abstract] Other Income and Other Expense Disclosure [Text Block] Other Income Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Related Party Transactions [Abstract] Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements