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Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	Apr. 25, 2015
Roll-forward of goodwill
Balance at beginning of period	$ 15,164	$ 13,923
Acquisitions	22,029	1,241
Balance at end of period	$ 37,193	$ 15,164
Goodwill
Key assumptions used in assessment of goodwill
Discount rate	8.40%
Terminal growth rate	2.00%

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- References

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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-Section 50
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Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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