Commitments and Contingent Liabilities (Details Textual) $ in Thousands	12 Months Ended
	Mar. 04, 2017 USD ($) Sale_And_Leaseback_Agreement Facility	Feb. 27, 2016 USD ($)	Feb. 28, 2015 USD ($)
Long-term Purchase Commitment [Line Items]
Total rental expense	$ 16,900	$ 15,500	$ 18,700
Number of sale and leaseback agreements | Sale_And_Leaseback_Agreement	1
Average annual lease payment	$ 1,000
Company's backlog bonded by performance bonds	96,200
Face value of performance bonds	343,700
Total value of letter of credit	23,500
Line of Credit Facility, Maximum Borrowing Capacity	175,000
Purchase obligations	$ 115,800
Number of properties acquired with historical environmental conditions | Facility	1
Proceeds from new markets tax credit transaction, net of deferred costs	$ 6,000
Deferred benefit from New Markets Tax Credit transactions	16,708	10,741
Deferred Costs		4,500
Other current and non-current liabilities
Long-term Purchase Commitment [Line Items]
Deferred gain on sale leaseback arrangements	1,800
Current Liabilities and Other Non Current Liabilities
Long-term Purchase Commitment [Line Items]
Reserve for environmental liabilities	$ 1,400	$ 1,600