INTANGIBLES - Change in the Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Goodwill [Line Items]
Balance at December 31, 2014	$ 862,338
Adjustment to preliminary purchase allocation	(5,266)
Acquisitions	41,104
Foreign currency impact	(39,644)
Balance at December 31, 2015	858,532
Freight Segment
Goodwill [Line Items]
Balance at December 31, 2014	515,067
Adjustment to preliminary purchase allocation	(1,210)
Acquisitions	28,964
Foreign currency impact	(10,856)
Balance at December 31, 2015	531,965
Transit Segment
Goodwill [Line Items]
Balance at December 31, 2014	347,271
Adjustment to preliminary purchase allocation	(4,056)
Acquisitions	12,140
Foreign currency impact	(28,788)
Balance at December 31, 2015	$ 326,567