GOODWILL AND INTANGIBLE ASSETS (Details3) (Panther Expedited Services, Inc., Software, USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2012 Y
Panther Expedited Services, Inc. \| Software
Property, Plant and Equipment
Amortization period (in years)	7
Annual amortization expense expected	$ 5

The average useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration