Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Mar. 02, 2013
Current assets
Cash and cash equivalents	$ 55,641	$ 37,767
Short-term available for sale securities	15,227	26,007
Restricted short-term investments	2,800	21,804
Receivables, net of allowance for doubtful accounts	126,881	121,170
Inventories	42,011	36,052
Refundable income taxes	0	1,371
Deferred tax assets	1,783	2,218
Other current assets	4,943	5,452
Total current assets	249,286	251,841
Property, plant and equipment, net	163,721	168,948
Available-for-sale Securities, Debt Securities, Noncurrent	11,044	12,807
Restricted investments	3,790	4,639
Goodwill	61,111	61,342
Intangible assets	12,264	13,675
Other assets	7,273	6,889
Total assets	508,489	520,141
Current liabilities
Accounts payable	39,010	34,235
Accrued payroll and related benefits	16,732	26,732
Accrued self-insurance reserves	6,231	6,145
Other current liabilities	24,917	23,643
Billings in excess of costs and earnings on uncompleted contracts	17,703	21,355
Current portion long-term debt	52	10,057
Accrued income taxes	703	0
Total current liabilities	105,348	122,167
Long-term debt	20,701	20,756
Unrecognized tax benefits	6,646	6,765
Long-term self-insurance reserves	7,704	8,030
Deferred tax liabilities	2,964	3,480
Other non-current liabilities	26,144	25,625
Commitments and contingent liabilities (Note 12)
Shareholders' equity
Common stock of $0.33-1/3 par value; authorized 50,000,000 shares; issued and outstanding 28,771,920 and 28,513,536, respectively	9,591	9,505
Additional paid-in capital	124,621	119,759
Retained earnings	213,607	211,135
Common stock held in trust	(775)	(761)
Deferred compensation obligations	775	761
Accumulated other comprehensive loss	(8,837)	(7,081)
Total shareholders’ equity	338,982	333,318
Total liabilities and shareholders' equity	$ 508,489	$ 520,141