Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Nov. 30, 2019	Mar. 02, 2019	Dec. 01, 2018
Statement Of Financial Position [Abstract]
Cash and cash equivalents, temporary investments	$ 2,727	$ 49,532	$ 63,330
Properties and equipment, accumulated depreciation	$ 586,592	$ 556,426	$ 551,065
Common stock, par value	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	25,000,000	25,000,000	25,000,000
Common stock, shares issued	6,262,000	6,262,000	6,262,000
Treasury stock, shares	1,986,000	1,981,000	2,019,000