Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands	Jan. 30, 2016	Jan. 31, 2015
Shareholders' equity [Abstract]:
Preferred Shares, par value (in dollars per share)	$ 0	$ 0
Preferred Shares, authorized (in shares)	100,000	100,000
Preferred Shares, issued (in shares)	0	0
Preferred Shares, outstanding (in shares)	0	0
Class A Common Shares
Shareholders' equity [Abstract]:
Common Shares, par value (in dollars per share)	$ 0	$ 0
Common Shares, authorized (in shares)	250,000	250,000
Common Shares, issued (in shares)	84,396	83,702
Common Shares, outstanding (in shares)	74,185	80,666
Class B Common Shares
Shareholders' equity [Abstract]:
Common Shares, par value (in dollars per share)	$ 0	$ 0
Common Shares, authorized (in shares)	100,000	100,000
Common Shares, issued (in shares)	7,733	7,733
Common Shares, outstanding (in shares)	7,733	7,733
Treasury Shares
Shareholders' equity [Abstract]:
Common Shares, outstanding (in shares)	10,211	3,036