Summary of Significant Accounting Policies and Related Data (Adoption of ASC 606) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 02, 2019	Dec. 01, 2018	Sep. 01, 2018	Jun. 02, 2018	Mar. 03, 2018	Dec. 02, 2017	Sep. 02, 2017	Jun. 03, 2017	Mar. 02, 2019	Mar. 03, 2018	Mar. 04, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 346,255								$ 1,402,637	$ 1,326,173	$ 1,114,533
Cost of sales	301,976								1,109,072	992,655	822,510
Gross profit	44,279	$ 84,090	$ 84,466	$ 80,730	$ 85,664	$ 91,559	$ 86,001	$ 70,294	293,565	333,518	292,023
Selling, general and administrative expenses	59,057								226,281	219,234	169,798
Operating income	(14,778)								67,284	114,284	122,225
Tax expense (benefit)	(5,062)								12,968	30,392	37,015
Net earnings	(12,083)	$ 21,891	$ 20,513	$ 15,373	22,329	$ 23,646	$ 17,409	$ 16,104	45,694	79,488	$ 85,790
Inventories	78,344				80,908				78,344	80,908
Costs and earnings on contracts in excess of billings	55,095				4,120				55,095	4,120
Billings in excess of costs and earnings on uncompleted contracts	21,478				12,461				21,478	12,461
Other current liabilities	83,159				79,696				83,159	79,696
Retained earnings	367,597				$ 373,259				367,597	$ 373,259
Without adoption of ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	339,673								1,382,274
Cost of sales	297,945								1,094,747
Gross profit	41,728								287,527
Selling, general and administrative expenses	58,726								225,286
Operating income	(16,998)								62,241
Tax expense (benefit)	(5,713)								11,850
Net earnings	(13,653)								41,769
Inventories	89,676								89,676
Costs and earnings on contracts in excess of billings	19,515								19,515
Billings in excess of costs and earnings on uncompleted contracts	21,022								21,022
Other current liabilities	81,467								81,467
Retained earnings	$ 363,672								$ 363,672