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Uncompleted Contracts - Summary (Details) (USD $) In Thousands, unless otherwise specified	Apr. 26, 2014	Apr. 27, 2013
Contractors [Abstract]
Costs incurred	$ 486,430	$ 393,287
Estimated earnings	166,250	146,378
Costs and estimated earnings on uncompleted contracts	652,680	539,665
Less billings to date	641,763	514,555
Costs in excess of billings, net	$ 10,917	$ 25,110

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Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 35

-Section 45

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.3(c)(3))

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