Income Taxes	6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	(4) Income Taxes Fastenal files income tax returns in the United States federal jurisdiction, all 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 2012 in the case of United States federal and foreign examinations and 2011 in the case of state and local examinations. As of June 30, 2015 and 2014, the Company had $4,299 and $3,916, respectively, of liabilities recorded related to gross 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 its total unrecognized tax benefits will change significantly during the next twelve months.

Income Taxes

6 Months Ended

Jun. 30, 2015

(4) Income Taxes

Fastenal files income tax returns in the United States federal jurisdiction, all 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 2012 in the case of United States federal and foreign examinations and 2011 in the case of state and local examinations.

As of June 30, 2015 and 2014, the Company had $4,299 and $3,916, respectively, of liabilities recorded related to gross 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 its total unrecognized tax benefits will change significantly during the next twelve months.