Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 26, 2012	Feb. 27, 2011	Feb. 28, 2010
Cash flows from operating activities:
Net earnings	$ 23,442	$ 32,621	$ 25,359
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	5,891	6,746	7,057
Loss on sale of fixed assets			250
Stock-based compensation	762	959	1,117
Provision for doubtful accounts receivable		21	(57)
Provision for deferred income taxes	22	567	(2,174)
Amortization of bond premium	1,481	1,271	734
Impairment of fixed assets	928
Non-cash restructuring	322	1,312
Changes in operating assets and liabilities:
Accounts receivable	6,260	1,859	(9,146)
Inventories	(2,947)	(907)	(1,273)
Prepaid expenses and other current assets	982	(2,572)	4,283
Other assets and liabilities	(1,642)	(1,620)	77
Accounts payable	(1,485)	(265)	1,690
Accrued liabilities	(968)	1,001	(4,493)
Income taxes payable	(1,614)	1,675	176
Net cash provided by operating activities	31,434	42,668	23,600
Cash flows from investing activities:
Purchases of property, plant and equipment	(3,994)	(3,699)	(3,422)
Proceeds from sales of property, plant and equipment		894	69
Purchases of marketable securities	(172,724)	(259,300)	(153,153)
Proceeds from sales and maturities of marketable securities	170,249	223,442	233,158
Business acquisition	(1,100)	(1,100)	(1,025)
Net cash (used in) provided by investing activities	(7,569)	(39,763)	75,627
Cash flows from financing activities:
Dividends paid	(8,296)	(28,903)	(7,389)
Proceeds from exercise of stock options	1,810	3,639	1,178
Tax benefits from stock-based compensation	91	527	130
Net cash used in financing activities	(6,395)	(24,737)	(6,081)
Increase (decrease) in cash and cash equivalents before effect of exchange rate changes	17,470	(21,832)	93,146
Effect of exchange rate changes on cash and cash equivalents	(162)	(3)	94
Increase (decrease) in cash and cash equivalents	17,308	(21,835)	93,240
Cash and cash equivalents, beginning of year	112,195	134,030	40,790
Cash and cash equivalents, end of year	$ 129,503	$ 112,195	$ 134,030