Commitments and Contingent Liabilities (Details Textual)	12 Months Ended
	Mar. 02, 2019 USD ($) Sale_And_Leaseback_Agreement Facility	Mar. 03, 2018 USD ($)	Mar. 04, 2017 USD ($)
Long-term Purchase Commitment [Line Items]
Total rental expense	$ 25,100,000	$ 21,800,000	$ 16,900,000
Future minimum lease payments	$ 68,657,000
Number of sale and leaseback agreements | Sale_And_Leaseback_Agreement	1
Average annual lease payment	$ 1,000,000
Company's backlog bonded by performance bonds	313,200,000
Face value of performance bonds	570,600,000
Project related liability	42,100,000	26,400,000
Total value of letter of credit	25,100,000
Purchase obligations	$ 132,200,000
Number of properties acquired with historical environmental conditions | Facility	1
Proceeds received	$ 26,500
Deferred costs	5,600
Other current and non-current liabilities
Long-term Purchase Commitment [Line Items]
Deferred gain on sale leaseback arrangements	800,000
Current Liabilities and Other Non Current Liabilities
Long-term Purchase Commitment [Line Items]
Reserve for environmental liabilities	1,200,000	$ 1,300,000
Sotawall
Long-term Purchase Commitment [Line Items]
Total rental expense	3,200,000
Future minimum lease payments	$ 12,700,000