Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 02, 2013	Mar. 03, 2012
Current assets
Cash and cash equivalents	$ 37,767	$ 54,027
Short-term marketable securities available for sale	26,007	11,664
Restricted short-term investments	21,804	13,603
Receivables, net of allowance for doubtful accounts	121,170	108,424
Inventories	36,052	34,045
Refundable income taxes	1,371	0
Deferred tax assets	2,218	4,294
Other current assets	5,452	3,382
Total current assets	251,841	229,439
Property, plant and equipment, net	168,948	159,547
Marketable securities available for sale	12,807	7,936
Restricted investments	4,639	9,533
Goodwill	61,342	61,617
Intangible assets	13,675	16,092
Other non-current assets	6,889	8,940
Total assets	520,141	493,104
Current liabilities
Accounts payable	34,235	34,025
Accrued payroll and related benefits	26,732	23,699
Accrued self-insurance reserves	6,145	4,668
Other current liabilities	23,466	19,017
Current liabilities of discontinued operations	177	799
Billings in excess of costs and earnings on uncompleted contracts	21,355	22,550
Current portion long-term debt	10,057	108
Accrued income taxes	0	905
Total current liabilities	122,167	105,771
Long-term debt	20,756	20,916
Unrecognized tax benefits	6,765	8,918
Long-term self-insurance reserves	8,030	9,605
Deferred tax liabilities	3,480	2,247
Other non-current liabilities	25,143	23,929
Liabilities of discontinued operations	482	520
Commitments and contingent liabilities (Note 16)
Shareholders’ equity
Common stock of $0.33-1/3 par value; authorized 50,000,000 shares; issued and outstanding 28,513,536 and 28,062,049, respectively	9,505	9,354
Additional paid-in capital	119,759	113,046
Retained earnings	211,135	203,558
Common stock held in trust	(761)	(745)
Deferred compensation obligations	761	745
Accumulated other comprehensive loss	(7,081)	(4,760)
Total shareholders’ equity	333,318	321,198
Total liabilities and shareholders’ equity	$ 520,141	$ 493,104