Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

(Dollars in thousands)	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Revenues before Inter-segment Eliminations
Freight	$	878,524		$	839,829		$	1,709,571		$	1,607,570
Logistics	448,029			394,012			867,175			763,987
Truckload	162,920			155,451			320,243			300,666
Other	14,636			12,297			28,927			24,294
Inter-segment Revenue Eliminations	(58,013		)	(53,040		)	(113,659		)	(102,341		)
	$	1,446,096		$	1,348,549		$	2,812,257		$	2,594,176
Inter-segment Revenue Eliminations
Freight	$	13,466		$	12,435		$	25,872		$	23,726
Logistics	11,822			8,644			22,167			14,805
Truckload	19,205			21,524			38,771			42,370
Other	13,520			10,437			26,849			21,440
	$	58,013		$	53,040		$	113,659		$	102,341
Revenues from External Customers
Freight	$	865,058		$	827,394		$	1,683,699		$	1,583,844
Logistics	436,207			385,368			845,008			749,182
Truckload	143,715			133,927			281,472			258,296
Other	1,116			1,860			2,078			2,854
	$	1,446,096		$	1,348,549		$	2,812,257		$	2,594,176
Operating Income (Loss)
Freight	$	53,429		$	39,155		$	87,931		$	59,499
Logistics	12,688			12,095			24,982			20,741
Truckload	14,619			10,323			25,169			17,406
Other	(593		)	(1,408		)	(2,249		)	(785		)
	$	80,143		$	60,165		$	135,833		$	96,861