(Goodwill acquired in business combination by reportable segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Rollforward of goodwill by reportable segment
12/31/2015	$ 682,810	[1]
Adjustments to goodwill for purchase accounting	569
3/31/2016	683,379	[1]
TL
Rollforward of goodwill by reportable segment
12/31/2015	254,940
Adjustments to goodwill for purchase accounting	569
3/31/2016	255,509
LTL
Rollforward of goodwill by reportable segment
12/31/2015	197,312
Adjustments to goodwill for purchase accounting	0
3/31/2016	197,312
Global Solutions
Rollforward of goodwill by reportable segment
12/31/2015	230,558
Adjustments to goodwill for purchase accounting	0
3/31/2016	$ 230,558

[1] See Note 13 “Restatement of Previously Issued Financial Statements