XML 51 R59.htm IDEA: XBRL DOCUMENT

Segment Information (Summary Of Segment Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 553,186us-gaap_Revenues	$ 551,961us-gaap_Revenues	$ 542,120us-gaap_Revenues	$ 492,022us-gaap_Revenues	$ 517,920us-gaap_Revenues	$ 511,728us-gaap_Revenues	$ 506,648us-gaap_Revenues	$ 492,887us-gaap_Revenues	$ 2,139,289us-gaap_Revenues	$ 2,029,183us-gaap_Revenues	$ 2,036,386us-gaap_Revenues
Operating Income	52,627us-gaap_OperatingIncomeLoss	41,690us-gaap_OperatingIncomeLoss	42,330us-gaap_OperatingIncomeLoss	23,441us-gaap_OperatingIncomeLoss	36,089us-gaap_OperatingIncomeLoss	32,583us-gaap_OperatingIncomeLoss	42,361us-gaap_OperatingIncomeLoss	28,693us-gaap_OperatingIncomeLoss	160,088us-gaap_OperatingIncomeLoss	139,726us-gaap_OperatingIncomeLoss	171,444us-gaap_OperatingIncomeLoss
Truckload Transportation Services
Segment Reporting Information [Line Items]
Revenues									1,702,137	1,657,854	1,699,349
Operating Income									152,992	119,597	153,142
Value Added Services
Segment Reporting Information [Line Items]
Revenues									390,645	361,384	324,155
Operating Income									7,535	14,664	15,999
Other
Segment Reporting Information [Line Items]
Revenues									46,588	11,342	11,782
Operating Income									(3,991)	3,947	1,212
Corporate
Segment Reporting Information [Line Items]
Revenues									2,803	3,081	4,322
Operating Income									3,552	1,518	1,091
Subtotal [Member]
Segment Reporting Information [Line Items]
Revenues									2,142,173	2,033,661	2,039,608
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues									$ (2,884)	$ (4,478)	$ (3,222)