Consolidated Balance Sheets (Parenthetical) (USD $)	Jan. 28, 2012	Jan. 29, 2011
Preferred shares, par value
Preferred shares, shares authorized	10,000,000	10,000,000
Preferred shares, shares issued
Preferred shares, shares outstanding
Common shares, par value
Common shares, shares authorized	150,000,000	150,000,000
Common shares, shares issued	42,047,991	44,629,656
Common shares, shares outstanding	42,047,991	44,629,656