Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 03, 2018	Feb. 25, 2017
Statement Of Financial Position [Abstract]
Cash and cash equivalents, temporary investments	$ 115,456	$ 149,375
Accounts receivable, allowance for doubtful accounts	$ 236	$ 338
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	125,232,000	125,232,000
Treasury stock, shares	41,974,000	42,050,000