Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Aug. 29, 2015	Feb. 28, 2015	Aug. 30, 2014
Statement of Financial Position [Abstract]
Cash and cash equivalents, temporary investments	$ 36,979	$ 69,572	$ 38,227
Properties, accumulated depreciation	$ 463,835	$ 446,237	$ 437,883
Common stock, par value	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000	500,000,000
Common stock, shares issued	125,232,000	125,232,000	125,232,000
Treasury stock, shares	38,185,000	35,320,000	33,218,000