Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 01, 2018	Dec. 02, 2017	Dec. 01, 2018	Dec. 02, 2017	Mar. 03, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 357,718	$ 356,506	$ 1,056,382	$ 972,721
Cost of sales	273,628	264,947	807,096	724,868
Gross profit	84,090	91,559	249,286	247,853
Selling, general and administrative expenses	52,682	57,024	167,224	161,438
Operating income	31,408	34,535	82,062	86,415
Income tax expense	6,730	9,704	18,030	26,517
Net earnings	21,891	$ 23,646	57,778	$ 57,159
Inventories	79,847		79,847		$ 80,908
Costs and earnings on contracts in excess of billings	60,140		60,140		4,120
Billings on contracts in excess of costs and earnings	26,961		26,961		12,461
Other current liabilities	59,230		59,230		79,696
Retained earnings	400,289		400,289		$ 373,259
Without adoption of ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	355,765		1,042,600
Cost of sales	272,087		796,802
Gross profit	83,678		245,798
Selling, general and administrative expenses	52,692		166,560
Operating income	30,986		79,238
Income tax expense	6,627		17,355
Net earnings	21,572		55,628
Inventories	89,250		89,250
Costs and earnings on contracts in excess of billings	30,756		30,756
Billings on contracts in excess of costs and earnings	25,923		25,923
Other current liabilities	57,802		57,802
Retained earnings	$ 398,139		$ 398,139