Accounts Payable and Accrued Expenses - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Accounts Payable And Accrued Expenses [Line Items]
Earn-out liability settled	$ 3.2
Other Liabilities [Member]
Accounts Payable And Accrued Expenses [Line Items]
Non-current portion of earn-out liability	$ 10.0	$ 17.9

Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

Name:	us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant