Commitments and Contingent Liabilities (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 01, 2014 Sale_And_Leaseback_Agreement	Mar. 02, 2013	Mar. 03, 2012
Long-term Purchase Commitment [Line Items]
Total rental expense	$ 15,400	$ 13,000	$ 11,900
Number of sale and leaseback agreements	1
Average annual lease payment	1,600
Company's backlog bonded by performance bonds	98,400
Face value of performance bonds	275,700
Total value of letter of credit	23,500
Line of Credit Facility, Maximum Borrowing Capacity	100,000
Purchase obligations	96,200
Proceeds from new markets tax credit transaction, net of deferred costs	7,800
Gross proceeds from new markets tax credits	10,700
Deferred Costs	3,300
Designated as Hedging Instrument | Foreign Exchange Forward [Member] | Forward Contracts [Member]
Long-term Purchase Commitment [Line Items]
Foreign exchange forward contract US dollar notional value	3,000
Other current and non-current liabilities
Long-term Purchase Commitment [Line Items]
Deferred gain under sale and leaseback transactions	$ 3,600