Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($)	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
us-gaap_StatementOfStockholdersEquityAbstract
Tax Effect of Unrealized Gains (Losses) On Available-For-Sale Securities	$ (28,000)	$ (608,000)	$ 6,000
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends per share	$ 1.32	$ 1.29	$ 1.2
Class A common stock shares sold through employee stock purchase plans	34,238	17,455	16,305
Exercised	4,025	8,051
Class A common stock shares issued through restricted stock grant plans	169,907	96,465	118,745
Retirement of treasury shares - retired shares	2,082,535	1,320,182	179,990