Purchase Price Allocation (Parenthetical) (Detail)	0 Months Ended
Dec. 11, 2013 Amba Trade names	Dec. 11, 2013 Amba Client relationships	Dec. 11, 2013 Amba Other intangibles	Dec. 11, 2013 Amba Total Intangible Assets	Jun. 26, 2014 ICRA Trade names	Jun. 26, 2014 ICRA Client relationships	Jun. 26, 2014 ICRA Other intangibles	Jun. 26, 2014 ICRA Total Intangible Assets
Business Acquisition [Line Items]
Weighted average life of intangible assets acquired (in years)	7 years	12 years	3 years	11 years	0 years	0 years	0 years	0 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration