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Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 segment	Mar. 31, 2011
Business Segments
Number of reportable operating business segments	3
Revenue:
Total revenue	$ 9,479,055	$ 7,079,406
Gross profit:
Gross profit	157,235	136,768
Income from operations:
Income from operations	59,256	55,525
Operating Segments
Income from operations:
Income from operations	70,478	66,188
Aviation segment
Revenue:
Total revenue	3,411,547	2,646,592
Gross profit:
Gross profit	64,914	70,128
Income from operations:
Income from operations	26,833	38,170
Marine segment
Revenue:
Total revenue	3,904,191	2,999,419
Gross profit:
Gross profit	55,077	40,215
Income from operations:
Income from operations	27,445	17,355
Land segment
Revenue:
Total revenue	2,163,317	1,433,395
Gross profit:
Gross profit	37,244	26,425
Income from operations:
Income from operations	16,200	10,663
Corporate
Income from operations:
Corporate overhead	$ 11,222	$ 10,663

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- Definition

Represents the number of reportable operating business segments of the entity.

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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

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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



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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

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