AMORTIZATION OF INTANGIBLE ASSETS Values Assigned to Intangible Assets (Other Than Goodwill) for Acquisitions (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Book Value	$ 25,973
Amortized Intangible Assets, Accumulated Amortization	(16,483)
Amortized Intangible Assets, Net Book Value	9,490	$ 10,957
Poole and Associates, Inc. | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Book Value	20,914
Amortized Intangible Assets, Accumulated Amortization	(14,640)
Amortized Intangible Assets, Net Book Value	6,274
Milestone [Member] | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Book Value	2,170
Amortized Intangible Assets, Accumulated Amortization	(874)
Amortized Intangible Assets, Net Book Value	1,296
Innovative Engineering Solutions [Member] | Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Book Value	1,225
Amortized Intangible Assets, Accumulated Amortization	(391)
Amortized Intangible Assets, Net Book Value	834
Ponte Technology [Member] | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Book Value	1,664
Amortized Intangible Assets, Accumulated Amortization	(578)
Amortized Intangible Assets, Net Book Value	$ 1,086