Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 02, 2013	Mar. 03, 2012	Feb. 26, 2011
Operating Activities
Net earnings (loss)	$ 19,111	$ 4,645	$ (10,332)
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Net (earnings) loss from discontinued operations	(333)	52	(3,825)
Depreciation and amortization	26,529	27,246	28,218
Stock-based compensation	4,395	4,412	5,215
Deferred income taxes	3,557	(1,115)	(207)
Excess tax benefits from stock-based compensation	(483)	(92)	0
Gain on disposal of assets	(1,954)	(916)	(246)
Other, net	1,156	516	280
Changes in operating assets and liabilities:
Receivables	(13,364)	(7,931)	7,580
Inventories	(2,209)	(1,635)	(320)
Accounts payable and accrued expenses	11,684	(3,905)	(10,033)
Billings in excess of costs and earnings on uncompleted contracts	(1,195)	(856)	(15,330)
Refundable and accrued income taxes	(4,086)	7,887	(9,677)
Other, net	(2,092)	(327)	692
Net cash provided by (used in) continuing operating activities	40,716	27,981	(7,985)
Investing Activities
Capital expenditures	(34,664)	(9,650)	(9,126)
Proceeds from sales of property, plant and equipment	1,078	10,320	190
Acquisition of intangibles	(15)	(68)	(10)
Acquisition of businesses, net of cash acquired	0	0	(20,629)
Purchases of restricted investments	(10,000)	(12,628)	(37,087)
Sales/maturities of restricted investments	5,472	25,354	1,293
Purchases of marketable securities	(58,847)	(28,966)	(29,030)
Sales/maturities of marketable securities	41,295	35,571	80,008
Investments in corporate-owned life insurance policies	(1,451)	(1,435)	0
Net cash (used in) provided by investing activities	(57,132)	18,498	(14,391)
Financing Activities
Proceeds from issuance of debt	10,000	121	12,000
Payments on debt	(164)	(1,437)	(293)
Payments on debt issue costs	(633)	(159)	(1,039)
Stock issued to employees, net of shares withheld	862	(188)	(1,298)
Excess tax benefits from stock-based compensation	483	92	0
Repurchase and retirement of common stock	0	(2,392)	0
Dividends paid	(10,316)	(9,153)	(9,161)
Net cash provided by (used in) financing activities	232	(13,116)	209
Cash Flows of Discontinued Operations
Net cash used in operating activities	(193)	(3,427)	(466)
Net cash used in discontinued operations	(193)	(3,427)	(466)
(Decrease) increase in cash and cash equivalents	(16,377)	29,936	(22,633)
Effect of exchange rates on cash	117	(211)	6
Cash and cash equivalents at beginning of year	54,027	24,302	46,929
Cash and cash equivalents at end of period	37,767	54,027	24,302
Noncash Activity
Capital expenditures in accounts payable	$ 553	$ 546	$ 354