Acquisitions - Additional Information (Detail) - New World Systems Corporation [Member] - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Accrued purchase price		$ 4.0
Payment related to working capital holdback	$ 2.0
Net decrease to goodwill arising from adjusted contingencies	$ 2.4

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

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

Name:	us-gaap_GoodwillPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration