Summary of Debt Outstanding (Parenthetical) (Detail) $ in Millions	Jun. 30, 2016 USD ($)
Term Loan Facility
Debt [Line Items]
Fair value of term loan agreement	$ 287.5

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Line-of-Credit Arrangement
-URI http://asc.fasb.org/extlink&oid=6517033

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