Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2020	Aug. 01, 2020	May 02, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019
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Tax Effect of Unrealized Gains (Losses) On Available-For-Sale Securities	$ (85)	$ 146	$ (90)	$ (8)	$ 262	$ 126
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends per share			$ 0.33	$ 0.33	$ 0.33	$ 0.33
Class A common stock shares sold through employee stock purchase plans	21,234		26,957	18,252	5,402	20,676
Class A common stock shares issued through restricted stock grant plans	8,440	57,805	307,354	18,327	9,170	355,609
Retirement of treasury shares - retired shares	1,036,610		618,056	129,339		208,041

Aggregate dividends declared during the period for each share of common stock outstanding.

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Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Number of shares of common and preferred stock retired from treasury during the period.

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