Business Acquisitions - Estimated Fair Values of the Assets Acquired, Net of Cash acquired and Liabilities Assumed at the Acquisition Date (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]
GOODWILL	$ 50,852	$ 33,848
Toolbox Solutions, Inc. [Member]
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]
Current assets	1,268
Property and equipment	56
GOODWILL	15,628
Intangible assets	9,070
Current liabilities	(1,112)
Deferred revenue	(301)
Deferred income tax liability	(2,221)
Total purchase price	$ 22,388