Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	May 02, 2015	Jan. 31, 2015	May 03, 2014
Shareholders' equity [Abstract]:
Preferred Shares, par value (in dollars per share)	$ 0us-gaap_PreferredStockNoParValue	$ 0us-gaap_PreferredStockNoParValue	$ 0us-gaap_PreferredStockNoParValue
Preferred Shares, authorized (in shares)	100,000us-gaap_PreferredStockSharesAuthorized	100,000us-gaap_PreferredStockSharesAuthorized	100,000us-gaap_PreferredStockSharesAuthorized
Preferred Shares, issued (in shares)	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred Shares, outstanding (in shares)	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Class A Common Shares
Shareholders' equity [Abstract]:
Common Shares, par value (in dollars per share)	$ 0	$ 0	$ 0
Common Shares, authorized (in shares)	250,000	250,000	250,000
Common Shares, issued (in shares)	83,980	83,702	83,264
Common Shares, outstanding (in shares)	80,944	80,666	83,226
Class B Common Shares
Shareholders' equity [Abstract]:
Common Shares, par value (in dollars per share)	$ 0	$ 0	$ 0
Common Shares, authorized (in shares)	100,000	100,000	100,000
Common Shares, issued (in shares)	7,733	7,733	7,733
Common Shares, outstanding (in shares)	7,733	7,733	7,733
Treasury Stock [Member]
Shareholders' equity [Abstract]:
Common Shares, outstanding (in shares)	3,036	3,036	38
Treasury Stock, Shares	3,036	3,036	38

Face amount per share of no-par value common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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