Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Apr. 24, 2015
Snodgrass Litigation
Loss Contingencies [Line Items]
Low end range of probable loss	$ 6,000
Loss contingency accrual	6,000
Snodgrass, Utterback, and Mackin Litigation
Loss Contingencies [Line Items]
High end range of probable loss	$ 20,000
Number of outstanding litigations	3

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Amount of loss contingency liability.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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Number of pending claims pertaining to a loss contingency.

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The estimated maximum amount of possible loss from the contingency.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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The estimated minimum amount of possible loss from the contingency.

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