2.2.0.7 false Income Taxes 10601 - Disclosure - Income Taxes true false false false 1 USD false false Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit13 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Income Taxes 0 us-gaap_IncomeTaxExpenseBenefitAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 Income Taxes 1 us-gaap_IncomeTaxDisclosureTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 <div> (6) Income Taxes Fastenal, or one of its subsidiaries, files income tax returns in the United States Federal jurisdiction, numerous states, and various local and foreign jurisdictions. With limited exceptions, we are no longer subject to income tax examinations by taxing authorities for taxable years before 2007, in the case of United States Federal and non-United States examinations, and 2004, in the case of state and local examinations. As of September 30, 2010 and 2009, the Company had $1,728 and $7,253, respectively, of liabilities recorded related to unrecognized tax benefits. Included in this liability for unrecognized tax benefits is an immaterial amount for interest and penalties, both of which we classify as a component of income tax expense. The Company does not anticipate that total unrecognized tax benefits will change significantly during the next 12 months.   </div> (6) Income Taxes Fastenal, or one of its subsidiaries, files income tax returns in the United States Federal jurisdiction, numerous states, and various local false false false us-types:textBlockItemType textblock Description containing the entire income tax disclosure. Examples include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 136, 172 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 44, 45, 46, 47, 48, 49 false 1 2 false UnKnown UnKnown UnKnown false true