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Business Segments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 Item | Sep. 30, 2011
Business Segments |  |  |  |
Number of reportable operating business segments |  |  | 3 |
Revenue: |  |  |  |
Total revenue | $ 9,911,673 | $ 9,510,792 | $ 29,009,525 | $ 25,298,907
Gross profit: |  |  |  |
Gross profit | 180,752 | 170,847 | 510,110 | 472,717
Income from operations: |  |  |  |
Income from operations | 71,048 | 70,925 | 202,662 | 192,553
Operating Segments |  |  |  |
Income from operations: |  |  |  |
Income from operations | 85,289 | 84,780 | 238,010 | 228,381
Aviation segment |  |  |  |
Revenue: |  |  |  |
Total revenue | 3,823,338 | 3,540,503 | 10,782,756 | 9,551,924
Gross profit: |  |  |  |
Gross profit | 84,197 | 83,966 | 218,282 | 236,121
Income from operations: |  |  |  |
Income from operations | 39,808 | 41,228 | 92,601 | 117,022
Marine segment |  |  |  |
Revenue: |  |  |  |
Total revenue | 3,630,094 | 4,045,176 | 11,301,429 | 10,577,578
Gross profit: |  |  |  |
Gross profit | 53,960 | 50,069 | 160,785 | 140,958
Income from operations: |  |  |  |
Income from operations | 27,296 | 24,899 | 82,672 | 68,017
Land segment |  |  |  |
Revenue: |  |  |  |
Total revenue | 2,458,241 | 1,925,113 | 6,925,340 | 5,169,405
Gross profit: |  |  |  |
Gross profit | 42,595 | 36,812 | 131,043 | 95,638
Income from operations: |  |  |  |
Income from operations | 18,185 | 18,653 | 62,737 | 43,342
Corporate |  |  |  |
Income from operations: |  |  |  |
Corporate overhead | $ 14,241 | $ 13,855 | $ 35,348 | $ 35,828

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + 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 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + 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=6880815&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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