Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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- Definition

The aggregate expense charged against earnings to allocate the cost of acquired intangible assets.

+ References

No definition available.

+ Details

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- Details

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Goodwill and Acquired Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Jan. 02, 2015	Jan. 03, 2014	Jan. 02, 2015	Jan. 03, 2014
Goodwill And Other Intangible Asset [Line Items]
Change in goodwill			$ 33,600,000us-gaap_GoodwillPeriodIncreaseDecrease
Amortization of acquired intangible assets	4,651,000	3,652,000	13,338,000	10,949,000
Government Systems [Member]
Goodwill And Other Intangible Asset [Line Items]
Amortization of acquired intangible assets	1,517,000	544,000	3,959,000	1,660,000
Minimum [Member]
Goodwill And Other Intangible Asset [Line Items]
Other acquired intangible assets estimated useful lives			2 years
Maximum [Member]
Goodwill And Other Intangible Asset [Line Items]
Other acquired intangible assets estimated useful lives			10 years
NetNearU [Member] \| Government Systems [Member]
Goodwill And Other Intangible Asset [Line Items]
Change in goodwill related to an acquisition			$ 34,300,000