Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2019	Sep. 01, 2018	Aug. 31, 2019	Sep. 01, 2018	Mar. 03, 2019	Mar. 02, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 52,846		$ 52,846		$ 50,000	$ 0
Net sales	357,058	$ 362,133	712,424	$ 698,664
Cost of sales	270,851	277,667	545,250	533,468
Gross profit	86,207	84,466	167,174	165,196
Selling, general and administrative expenses	58,631	55,806	116,558	114,542
Operating income	27,576	28,660	50,616	50,654
Income tax expense	6,094	6,420	11,081	11,300
Net earnings	19,279	$ 20,513	34,722	$ 35,887
Inventories	74,284		74,284			78,344
Costs and earnings on contracts in excess of billings	74,971		74,971			55,095
Billings on contracts in excess of costs and earnings	19,459		19,459			21,478
Other current liabilities	87,174		87,174			92,696
Retained earnings	$ 374,439		$ 374,439			$ 367,597