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Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Business Segments
Number of reportable operating business segments			3
Revenue:
Total revenue	$ 8,708,709	$ 4,397,275	$ 15,788,115	$ 8,315,296
Gross profit:
Gross profit	165,102	107,569	301,870	206,387
Income from operations:
Income from operations	66,103	45,064	121,628	87,189
Operating Segments
Income from operations:
Income from operations	77,413	54,453	143,601	103,503
Aviation segment
Revenue:
Total revenue	3,364,829	1,691,042	6,011,421	3,150,766
Gross profit:
Gross profit	82,027	52,887	152,155	101,262
Income from operations:
Income from operations	37,624	28,701	75,794	55,395
Marine segment
Revenue:
Total revenue	3,532,983	2,276,651	6,532,402	4,375,263
Gross profit:
Gross profit	50,674	43,204	90,889	82,593
Income from operations:
Income from operations	25,763	23,972	43,118	43,980
Land segment
Revenue:
Total revenue	1,810,897	429,582	3,244,292	789,267
Gross profit:
Gross profit	32,401	11,478	58,826	22,532
Income from operations:
Income from operations	14,026	1,780	24,689	4,128
Corporate
Income from operations:
Corporate overhead	$ 11,310	$ 9,389	$ 21,973	$ 16,314

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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

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Amount of general expenses not normally included in Other Operating Costs and Expenses.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 6

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.6)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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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 SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 1

Reference 2: 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)
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