Net Income Per Common Share (Narrative) (Detail) shares in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2017 $ / shares shares	Mar. 31, 2017 $ / shares shares
Earnings Per Share [Abstract]
Number of shares issued in connection with acquisition of Citron and Lucid \| shares	5,122	5,122
Senior notes, initial conversion price per share \| $ / shares	$ 33.215	$ 33.215

Number of shares of equity interests issued or issuable to acquire entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration