Commitments and Contingent Liabilities (Details Textual) (USD $)	12 Months Ended
	Mar. 02, 2013 Sale_And_Leaseback_Agreement	Mar. 03, 2012	Feb. 26, 2011	Dec. 31, 2012 Designated as Hedging Instrument Foreign Exchange Forward Forward Contract	Mar. 02, 2013 Other current and non-current liabilities	Mar. 02, 2013 Other current liabilities Designated as Hedging Instrument Foreign Exchange Forward Forward Contract	Mar. 02, 2013 Building Sale_And_Leaseback_Agreement	Mar. 02, 2013 Equipment Sale_And_Leaseback_Agreement
Long-term Purchase Commitment [Line Items]
Total rental expense	$ 13,000,000	$ 11,900,000	$ 10,100,000
Number of sale and leaseback agreements	2						1	1
Deferred gain under sale and leaseback transactions					4,700,000
Average annual lease payment	2,000,000
Company's backlog bonded by performance bonds	105,800,000
Face value of performance bonds	360,400,000.0
Total value of letter of credit	35,800,000
Total availability under credit facility	100,000,000.0
Letter of credits issued under credit facility	23,400,000
Purchase obligations	87,900,000
Other commitment	100,000
Foreign exchange forward contract US dollar notional value				24,300,000
Fair value of contract, net liability						$ 400,000