Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 01, 2012	Mar. 03, 2012
Current assets
Cash and cash equivalents	$ 29,553	$ 54,027
Short-term marketable securities available for sale	25,091	11,664
Restricted short-term investments	13,615	13,603
Receivables, net of allowance for doubtful accounts	117,688	108,424
Inventories	39,409	34,045
Refundable income taxes	1,387	0
Deferred tax assets	3,680	4,294
Other current assets	3,221	3,382
Total current assets	233,644	229,439
Property, plant and equipment, net	162,898	159,547
Marketable securities available for sale	9,399	7,936
Restricted investments	17,458	9,533
Goodwill	61,393	61,617
Intangible assets	14,552	16,092
Other assets	8,131	8,940
Total assets	507,475	493,104
Current liabilities
Accounts payable	40,133	34,025
Accrued payroll and related benefits	17,611	23,699
Accrued self-insurance reserves	4,794	4,668
Other accrued expenses	16,491	19,017
Current liabilities of discontinued operations	352	799
Billings in excess of costs and earnings on uncompleted contracts	28,516	22,550
Current portion long-term debt	50	108
Accrued income taxes	0	905
Total current liabilities	107,947	105,771
Long-term debt	30,849	20,916
Unrecognized tax benefits	8,749	8,918
Long-term self-insurance reserves	7,933	9,605
Deferred tax liabilities	2,486	2,247
Other long-term liabilities	25,868	23,929
Liabilities of discontinued operations	504	520
Commitments and contingent liabilities (Note 13)
Shareholders' equity
Common stock of $0.33-1/3 par value; authorized 50,000,000 shares; issued and outstanding 28,345,247 and 28,062,049, respectively	9,448	9,354
Additional paid-in capital	115,668	113,046
Retained earnings	204,300	203,558
Common stock held in trust	(760)	(745)
Deferred compensation obligations	760	745
Accumulated other comprehensive loss	(6,277)	(4,760)
Total shareholders’ equity	323,139	321,198
Total liabilities and shareholders' equity	$ 507,475	$ 493,104