CONSOLIDATED BALANCE SHEETS (Unaudited) (PARENTHETICAL) - $ / shares	Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2015
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	10,742,285	10,664,512	9,662,176
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	27,124,011	26,962,656	26,926,331
Common Stock, shares outstanding	27,124,011	26,962,656	26,926,331
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	6,644,105	6,644,105	6,644,105
Common Stock, shares outstanding	6,644,105	6,644,105	6,644,105