Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 26, 2022	Feb. 27, 2021	Feb. 29, 2020
Operating Activities
Net earnings	$ 3,486	$ 15,436	$ 61,914
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	49,993	51,440	46,795
Share-based compensation	6,293	8,573	6,607
Deferred income taxes	(7,956)	(6,460)	10,463
Asset impairment on property, plant and equipment	21,497	1,400	0
Gain on disposal of assets	(20,987)	(20,044)	(2,197)
Impairment Expense	49,473	70,069	0
Noncash lease expense	12,418	12,235	12,420
Other, net	(1,272)	(2,088)	(1,516)
Changes in operating assets and liabilities:
Receivables	7,521	21,630	(4,217)
Inventories	(7,706)	(1,440)	7,142
Costs and earnings on contracts in excess of billings	(897)	44,183	(18,468)
Accounts payable and accrued expenses	3,348	(32,591)	(375)
Billings in excess of costs and earnings on uncompleted contracts	(14,288)	(10,351)	11,314
Refundable and accrued income taxes	11,017	2,652	(8,726)
Operating lease liability	(12,720)	(11,513)	(10,829)
Other, net	1,251	(1,268)	(3,065)
Net cash provided by operating activities	100,471	141,863	107,262
Investing Activities
Capital expenditures	(21,841)	(26,165)	(51,428)
Proceeds from sales of property, plant and equipment	30,599	25,108	5,307
Purchases of marketable securities	(1,038)	(3,606)	(7,012)
Sales/maturities of marketable securities	1,563	2,657	7,768
Other, net	0	(141)	(1,673)
Net cash provided (used) by investing activities	9,283	(2,147)	(47,038)
Financing Activities
Borrowings on line of credit	0	198,601	229,000
(Repayment) borrowings on debt	(2,000)	(5,400)	150,000
Payments on line of credit	0	(246,340)	(406,500)
Proceeds from exercise of stock options	4,115	1,456	0
Repurchase and retirement of common stock	(100,414)	(32,878)	(25,140)
Dividends paid	(20,266)	(19,601)	(18,714)
Other, net	(2,007)	(3,714)	(3,160)
Net cash used by financing activities	(120,572)	(107,876)	(74,514)
(Decrease) increase in cash, cash equivalents and restricted cash	(10,818)	31,840	(14,290)
Effect of exchange rates on cash	1,124	485	1
Cash, cash equivalents and restricted cash at beginning of year	47,277	14,952	29,241
Cash, cash equivalents and restricted cash at end of year	37,583	47,277	14,952
Noncash Activity
Capital expenditures in accounts payable	$ 2,326	$ 1,101	$ 2,169