GOODWILL AND INTANGIBLE ASSETS (Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Goodwill by reportable operating segment
Balance at the beginning of the period	$ 96,465
Purchase accounting adjustments	107
Balance at the end of the period	96,572
Premium Logistics (Panther)
Goodwill by reportable operating segment
Balance at the beginning of the period	71,096
Balance at the end of the period	71,096
Transportation Management (ABF Logistics)
Goodwill by reportable operating segment
Balance at the beginning of the period	19,387
Purchase accounting adjustments	107
Balance at the end of the period	19,494
Emergency & Preventative Maintenance (FleetNet)
Goodwill by reportable operating segment
Balance at the beginning of the period	630
Balance at the end of the period	630
Household Goods Moving Services (ABF Moving)
Goodwill by reportable operating segment
Balance at the beginning of the period	5,352
Balance at the end of the period	$ 5,352