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Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Information [Abstract]

Disclosure Of Segment Financial Information

		Years Ended December 31,
		2011				2010				2009
Revenues
Truckload Transportation Services		$	1,694,965			$	1,550,601			$	1,437,527
Value Added Services			291,109				250,983				217,942
Other			12,367				9,847				7,995
Corporate			4,409				3,589				3,006
Total		$	2,002,850			$	1,815,020			$	1,666,470
Operating Income
Truckload Transportation Services		$	157,604			$	122,208			$	84,524
Value Added Services			17,036				11,005				12,350
Other			(383	)			(427	)			(913	)
Corporate			(583	)			1,796				730
Total		$	173,674			$	134,582			$	96,691

Schedule Of Revenue And Long-Lived Assets, By Geographical Areas

		2011				2010				2009
Revenues
United States		$	1,772,628			$	1,614,183			$	1,509,560
Foreign countries
Mexico			147,938				121,821				84,441
Other			82,284				79,016				72,469
Total foreign countries			230,222				200,837				156,910
Total		$	2,002,850			$	1,815,020			$	1,666,470
Long-lived Assets
United States		$	931,658			$	824,649			$	853,802
Foreign countries
Mexico			9,993				16,119				17,871
Other			485				287				229
Total foreign countries			10,478				16,406				18,100
Total		$	942,136			$	841,055			$	871,902

X

- Definition

Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph b(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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