Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
us-gaap_StatementOfStockholdersEquityAbstract
Tax Effect of Unrealized Gains (Losses) On Available-For-Sale Securities	$ (608)	$ 6	$ 5
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends per share	$ 1.29	$ 1.2	$ 1.2
Class A common stock shares sold through employee stock purchase plans	17,455	16,305	20,941
Exercised	8,051	0	500
Class A common stock shares issued through restricted stock grant plans	96,465	118,745	164,927
Retirement of treasury shares - retired shares	1,320,182	179,990	1,509,965