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Commitments and Contingent Liabilities (Details Textual) $ in Thousands | 12 Months Ended
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Feb. 27, 2016 USD ($) Sale_And_Leaseback_Agreement | Feb. 28, 2015 USD ($) | Mar. 01, 2014 USD ($)
Long-term Purchase Commitment [Line Items] |  |  |
Total rental expense | $ 15,500 | $ 18,700 | $ 15,400
Number of sale and leaseback agreements | Sale_And_Leaseback_Agreement | 1 |  |
Deferred gain on sale leaseback arrangements | $ 1,818 | 1,818 |
Average annual lease payment | 1,000 |  |
Company's backlog bonded by performance bonds | 134,500 |  |
Face value of performance bonds | 328,600 |  |
Total value of letter of credit | 23,500 |  |
Line of Credit Facility, Maximum Borrowing Capacity | 125,000 |  |
Purchase obligations | 245,000 |  |
Proceeds from new markets tax credit transaction, net of deferred costs |  | 7,800 |
Deferred benefit from New Markets Tax Credit | 10,741 | 10,741 |
Deferred Costs |  | 3,300 |
Other current and non-current liabilities |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Deferred gain on sale leaseback arrangements | 2,300 |  |
Current Liabilities and Other Non Current Liabilities |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Reserve for environmental liabilities | $ 1,600 | $ 1,800 |

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