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v2.4.1.9

Geographic Information (Revenues By Geographic Areas) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Revenues | $ 926,254 us-gaap_SalesRevenueNet | $ 980,814 us-gaap_SalesRevenueNet | $ 949,938 us-gaap_SalesRevenueNet | $ 876,501 us-gaap_SalesRevenueNet | $ 813,760 us-gaap_SalesRevenueNet | $ 858,424 us-gaap_SalesRevenueNet | $ 847,596 us-gaap_SalesRevenueNet | $ 806,326 us-gaap_SalesRevenueNet | $ 3,733,507 us-gaap_SalesRevenueNet | $ 3,326,106 us-gaap_SalesRevenueNet | $ 3,133,577 us-gaap_SalesRevenueNet
United States [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 3,308,226 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = country_US | 2,951,673 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = country_US | 2,798,124 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = country_US
Canada [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 238,590 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = country_CA | 227,756 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = country_CA | 218,570 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = country_CA
Other Foreign Countries [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 186,691 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = fast_OtherCountriesMember | $ 146,677 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = fast_OtherCountriesMember | $ 116,883 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = fast_OtherCountriesMember

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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