CONSOLIDATED BALANCE SHEETS (Unaudited) (PARENTHETICAL) - $ / shares	Apr. 30, 2017	Jan. 31, 2017	Apr. 30, 2016
Preferred Stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred Stock, shares authorized	5,000,000	5,000,000	5,000,000
Preferred Stock, shares issued	0	0	0
Treasury Stock, shares	10,943,527	10,869,321	10,742,285
Common Stock Class Undefined
Common Stock, par value	$ 0.01	$ 0.01	$ 0.01
Common Stock, shares authorized	100,000,000	100,000,000	100,000,000
Common Stock, shares issued	27,286,230	27,176,656	27,124,011
Common Stock, shares outstanding	27,286,230	27,176,656	27,124,011
Class A Common Stock
Common Stock, par value	$ 0.01	$ 0.01	$ 0.01
Common Stock, shares authorized	30,000,000	30,000,000	30,000,000
Common Stock, shares issued	6,651,950	6,644,105	6,644,105
Common Stock, shares outstanding	6,651,950	6,644,105	6,644,105