ACQUISITIONS - Additional Information (Detail) - USD ($) $ in Thousands								12 Months Ended
	Oct. 30, 2015	Oct. 08, 2015	Jun. 17, 2015	Feb. 04, 2015	Sep. 03, 2014	Aug. 19, 2014	Jun. 06, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash								$ 129,550	$ 300,437	$ 223,454
Goodwill								858,532	862,338
Deposit in escrow								202,942	0
Acquired intangible assets									142,100
Goodwill and other intangible assets									297,400
Trade Names
Business Acquisition [Line Items]
Acquired intangible assets									27,400
Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets									$ 106,000
Average useful life, years									20 years
Noncompete Agreements
Business Acquisition [Line Items]
Acquired intangible assets									$ 2,400
Average useful life, years									5 years
Order or Production Backlog
Business Acquisition [Line Items]
Acquired intangible assets									$ 6,300
2015 Acquisitions
Business Acquisition [Line Items]
Deposit in escrow								$ 36,700
Relay Monitoring Systems PTY Ltd.
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash	$ 18,700
Goodwill	7,584
Acquired intangible assets	10,426
Goodwill and other intangible assets	$ 18,710
RCL
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash				$ 78,000
Goodwill				14,940
Acquired intangible assets				40,403
Goodwill and other intangible assets				$ 78,011
C2CE
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash					$ 25,500
Goodwill					15,896
Acquired intangible assets					3,654
Goodwill and other intangible assets					$ 25,479
Metalocaucho
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash			$ 23,400
Goodwill			12,141
Acquired intangible assets			7,649
Goodwill and other intangible assets			$ 23,360
Track IQ
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash		$ 9,100
Goodwill		6,440
Acquired intangible assets		3,246
Goodwill and other intangible assets		$ 9,103
Fandstan Electric Group Ltd
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash							$ 199,400
Goodwill							62,476
Acquired intangible assets							50,598
Goodwill and other intangible assets							$ 199,404
Dia-Frag
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash						$ 70,600
Goodwill						35,850
Acquired intangible assets						26,150
Goodwill and other intangible assets						$ 70,641
Business acquisitions by Freight and Transit Segments
Business Acquisition [Line Items]
Goodwill									$ 155,300