Acquisitions - Additional Information (Detail) - New World Systems Corporation [Member] - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Accrued purchase price		$ 4.0
Payment related to working capital holdback	$ 2.0
Net increase to goodwill arising from adjusted contingencies	$ 1.5

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration