Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance, March 1, 2016 (in shares) at Mar. 01, 2016	20,965,144				730,473
Balance, March 1, 2016 at Mar. 01, 2016	$ 2,096	$ 166,398	$ 25,922	$ 1,471	$ (15,020)
Net earnings (loss)			9,283
Foreign currency translation				30
Unrealized holding gains (losses) arising during the period				(475)
Stock-based compensation		1,214
Cash dividends			(8,093)
Balance (in shares) at Feb. 26, 2017	20,965,144				730,473
Balance at Feb. 26, 2017	$ 2,096	167,612	27,112	1,026	$ (15,020)
Net earnings (loss)			20,595			$ 20,595
Foreign currency translation				(50)
Unrealized holding gains (losses) arising during the period				(845)
Stock-based compensation		1,445
Cash dividends			(68,806)
Stock options exercised (in shares)					(6,900)	6,900
Stock options exercised		(46)			$ 142
Balance (in shares) at Feb. 25, 2018	20,965,144				723,573
Balance at Feb. 25, 2018	$ 2,096	169,011	(21,099)	131	$ (14,878)	$ 135,261
Net earnings (loss)			113,545			$ 113,545
Foreign currency translation				(1,310)
Unrealized holding gains (losses) arising during the period				1,157
Stock-based compensation		1,541
Cash dividends			(95,051)
Stock options exercised (in shares)						244,382
Stock options exercised (in shares)					(244,382)
Stock options exercised		(1,157)			$ 5,025
Balance (in shares) at Mar. 03, 2019	20,965,144				479,191
Balance at Mar. 03, 2019	$ 2,096	$ 169,395	$ (2,605)	$ (22)	$ (9,853)	$ 159,011