Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 01, 2013	Mar. 02, 2013
Current assets
Cash and cash equivalents	$ 37,147	$ 37,767
Short-term available for sale securities	29,775	26,007
Restricted short-term investments	2,800	21,804
Receivables, net of allowance for doubtful accounts	117,429	121,170
Inventories	40,494	36,052
Refundable income taxes	531	1,371
Deferred tax assets	1,714	2,218
Other current assets	4,782	5,452
Total current assets	234,672	251,841
Property, plant and equipment, net	164,052	168,948
Available-for-sale Securities, Debt Securities, Noncurrent	11,882	12,807
Restricted investments	4,393	4,639
Goodwill	61,380	61,342
Intangible assets	13,068	13,675
Other assets	7,883	6,889
Total assets	497,330	520,141
Current liabilities
Accounts payable	32,484	34,235
Accrued payroll and related benefits	16,011	26,732
Accrued self-insurance reserves	5,295	6,145
Other current liabilities	23,585	23,643
Billings in excess of costs and earnings on uncompleted contracts	19,304	21,355
Current portion long-term debt	58	10,057
Total current liabilities	96,737	122,167
Long-term debt	20,746	20,756
Unrecognized tax benefits	6,525	6,765
Long-term self-insurance reserves	8,247	8,030
Deferred tax liabilities	3,211	3,480
Other non-current liabilities	26,096	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 28,741,227 and 28,513,536, respectively	9,580	9,505
Additional paid-in capital	122,624	119,759
Retained earnings	210,487	211,135
Common stock held in trust	(768)	(761)
Deferred compensation obligations	768	761
Accumulated other comprehensive loss	(6,923)	(7,081)
Total shareholders’ equity	335,768	333,318
Total liabilities and shareholders' equity	$ 497,330	$ 520,141