Operations by Industry Segments and Geographic Area - Schedule of Revenue Based on Point of Sale (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Sep. 30, 2014	Sep. 30, 2013
Revenues from unaffiliated customers:
Revenues from unaffiliated customers	$ 81,343	$ 67,249
United States [Member]
Revenues from unaffiliated customers:
Revenues from unaffiliated customers	45,919	41,780
United Kingdom [Member]
Revenues from unaffiliated customers:
Revenues from unaffiliated customers	24,979	22,342
Continental Europe [Member]
Revenues from unaffiliated customers:
Revenues from unaffiliated customers	9,246	2,407
Asia-Pacific [Member]
Revenues from unaffiliated customers:
Revenues from unaffiliated customers	$ 1,199	$ 720

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration