Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 01, 2018	Sep. 02, 2017	Sep. 01, 2018	Sep. 02, 2017	Mar. 03, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 362,133	$ 343,907	$ 698,664	$ 616,214
Cost of sales	277,667	257,906	533,468	459,919
Gross profit	84,466	86,001	165,196	156,295
Selling, general and administrative expenses	55,806	58,227	114,542	104,415
Operating income	28,660	27,774	50,654	51,880
Income tax expense	6,420	8,909	11,300	16,813
Net earnings	20,513	$ 17,409	35,887	$ 33,512
Inventories	81,933		81,933		$ 80,908
Costs and earnings on contracts in excess of billings	44,585		44,585		4,120
Billings on contracts in excess of costs and earnings	24,907		24,907		12,461
Other current liabilities	69,707		69,707		79,696
Retained earnings	402,619		402,619		$ 373,259
Without adoption of ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	359,584		686,835
Cost of sales	276,058		524,715
Gross profit	83,526		162,120
Selling, general and administrative expenses	55,481		113,868
Operating income	28,045		48,252
Income tax expense	6,274		10,726
Net earnings	20,044		34,059
Inventories	90,006		90,006
Costs and earnings on contracts in excess of billings	16,943		16,943
Billings on contracts in excess of costs and earnings	23,657		23,657
Other current liabilities	68,373		68,373
Retained earnings	$ 407,446		$ 407,446