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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 03, 2012
Feb. 26, 2011
Feb. 27, 2010
Operating Activities      
Net earnings (loss) $ 4,645 $ (10,332) $ 31,742
Adjustments to reconcile net earnings to net cash provided by operating activities:      
Net loss (earnings) from discontinued operations 52 (3,825) (525)
Depreciation and amortization 27,246 28,218 29,601
Stock-based compensation 4,412 5,215 6,055
Deferred income taxes (1,115) (207) 763
Excess tax benefits from stock-based compensation (92)   (162)
(Gain) loss on disposal of assets (916) (246) 770
Other, net 516 280 92
Changes in operating assets and liabilities:      
Receivables (7,931) 7,580 44,209
Inventories (1,635) (320) 8,953
Accounts payable and accrued expenses (3,905) (10,033) (12,844)
Billings in excess of costs and earnings on uncompleted contracts (856) (15,330) (16,109)
Refundable and accrued income taxes 7,887 (9,677) 3,980
Other, net (327) 692 709
Net cash provided by (used in) continuing operating activities 27,981 (7,985) 97,234
Investing Activities      
Capital expenditures (9,650) (9,126) (9,765)
Proceeds from sales of property, plant and equipment 10,320 190 276
Acquisition of intangibles (68) (10) (250)
Acquisition of businesses, net of cash acquired   (20,629)  
Purchases of restricted investments (12,628) (37,087)  
Sales/maturities of restricted investments 25,354 1,293  
Purchases of marketable securities (28,966) (29,030) (71,214)
Sales/maturities of marketable securities 35,571 80,008 27,708
Investments in corporate-owned life insurance policies (1,435)    
Net cash provided by (used in) continuing investing activities 18,498 (14,391) (53,245)
Financing Activities      
Proceeds from issuance of debt 121 12,000  
Payments on debt (1,437) (293)  
Payments of debt issue costs (159) (1,039) (6)
Shares withheld for taxes, net of stock issued to employees (188) (1,298) (876)
Excess tax benefits from stock-based compensation 92   162
Repurchase and retirement of common stock (2,392)    
Dividends paid (9,153) (9,161) (9,112)
Net cash (used in) provided by continuing financing activities (13,116) 209 (9,832)
Cash Flows of Discontinued Operations      
Net cash used in operating activities (3,427) (466) (222)
Net cash used in discontinued operations (3,427) (466) (222)
Increase (decrease) in cash and cash equivalents 29,936 (22,633) 33,935
Effect of exchange rates on cash (211) 6  
Cash and cash equivalents at beginning of year 24,302 46,929 12,994
Cash and cash equivalents at end of year 54,027 24,302 46,929
Noncash Activity      
Capital expenditures in accounts payable $ 546 $ 354 $ 311