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Working Capital (Schedule of Receivables) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 02, 2013 | Mar. 03, 2012
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total receivables | $ 123,663 | $ 111,533
Less allowance for doubtful accounts | (2,493) | (3,109)
Net receivables | 121,170 | 108,424
Trade accounts |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total receivables | 73,801 | 78,234
Construction contracts |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total receivables | 31,313 | 19,693
Contract retainage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total receivables | 15,711 | 11,348
Other receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total receivables | $ 2,838 | $ 2,258

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