Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	(1) Basis of Presentation The accompanying unaudited consolidated financial statements of Fastenal Company and subsidiaries (collectively referred to as the Company, Fastenal, or by terms such as we, our, or us) have been prepared in accordance with United States generally accepted accounting principles for interim financial information. They do not include all information and footnotes required by United States generally accepted accounting principles for complete financial statements. However, except as described herein, there has been no material change in the information disclosed in the notes to consolidated financial statements included in our consolidated financial statements as of and for the year ended December 31, 2013. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.